Abstract: A sighting aid for golfers is characterized by a transparent lens having a sight line extending laterally across a surface thereof and a plurality of dots spaced along a line normal to the sight line. The dots are arranged adjacent to an edge of the lens beyond the focal path of the eye closest to the golfer's target. The dots are used by the golfer to spot a new target line for executing a golf shot for a breaking putt or for a fade or draw.

Abstract: Improvements in eye glasses for training in bowling, bowling per se, and bowling competition; eye glasses of a surround-type covering the front and sides of the entire field of vision of both human eyes; selective masking of the eye glasses whereby to form two substantially vertical, substantially parallel windows through which the bowler can see the lane in front of him/her and the pins that he/she is aiming for, but has the view in both lateral directions, at least two bowling lane widths, masked from his/her vision.

Abstract: There is provided an apparatus for treating individuals suffering from binocular diplopia. The apparatus comprises a frame, having first and second viewing lenses, and includes a mechanism for supporting the frame in an operative position relative to the individual such that the first and second lenses are in front of the left and the right eyes respectively. Each eye of the individual is considered as having a range of vision defined by left and right fields of view. A first occluding device is associated with the first viewing lens, for occluding at least a portion of the right field of view of the left eye. A second occluding device is associated with the second viewing lens, for occluding at least a portion of the left field of view of the right eye. In this arrangement, monocular vision is substantially achieved alternately between the left and right eyes as the eyes scan to the left and right respectively.

Abstract: A vision improvement device using glasses in which one or more lens is a rapid shutter, such as a liquid crystal shutter. The subject wears the glasses and the shutter is rapidly operated such that vision from the strong eye is subdued or blocked off long enough to allow the weak eye information to be processed by the brain to promote improved depth perception. One eye is permitted to see while the other eye is occluded. By control of the shutter the weaker eye can be exposed for longer than the stronger eye to compensate for the brain's ability to ignore the weak eye information. In an alternative embodiment, individual eyes may be manipulated to favor one over the other to achieve the benefit of improving depth perception. As such, control over vision results in an improved balance of per-eye information, increasing stereoscopic vision.

Abstract: A golf sighting spectacle device is provided to be worn by a golfer to aid in sighting the golf ball during a swing. The sighting device is a spectacle consisting of lenses having neutral density filters transmitting 1.5 percent of the visible light and being opaque in the ultraviolet. The sighting device, for the right handed golfer, has a 1/8 inch diameter aperture in the left eyepiece located to the left and below the optical center of the eyepiece. In the version for the left handed golfer, the aperture is in the mirror image of the lens, being to the right and below the optical center instead of being to the left and below the optical center of the eyepiece.

Abstract: The invention provides a tinted pair of lenses for overcoming the deleterious effects of nystagmic oscillations, particularly in persons suffering from dyslexia, the tinting varying along the lateral direction and extending in each lens over at least two zones, a lighter tint being used in a first zone extending from the lens edge nearest to the nose of the wearer, when the lens is in use, to a position corresponding to the centre of the pupil, and a darker tint being used in a second zone extending over the remaining lens area.

Abstract: Eyewear for use by a person exposed to an environment of glare-inducing illumination. The eyewear has a frontal portion for confronting the eyes, which frontal portion extends between an upper and lower periphery. A transparent optical region is provided within the frontal portion for intercepting lines of sight substantially above and below the slightly elevated standard line of sight at the mid-pupillary position of the eyes. For normalizing overhead and reflected glare to a level of diffuse illumination reducing veiling luminance and asthenopic effects, upper and lower translucent regions arc provided within the frontal portion. The upper translucent region extends substantially upwardly from between the standard line of sight and the upper periphery of the frontal portion. The lower translucent region extends substantially downwardly from between the standard line of sight and the lower periphery of the frontal portion.

Abstract: Night driving eyeglasses include an illuminating color band extending upwardly from the bottom of the lens to cover about 50 per cent to about 75 per cent of the surface area of the lens and a glare-reducing color band extending downwardly from the top of the lens to cover about 25 per cent to about 50 per cent of the surface area of the lens, with a distinct interface between the color bands. The glasses further include a nonreflective coating made from a plurality of layers of magnesium oxide selectively applied to a surface of the lenses of the glasses. Preferably, the distinct interface is located about 5 mm above the top of the wearer's pupil. The color bands and the nonreflective coating all cooperate to equalize the illumination of the wearer's entire field of vision.

Abstract: A person's sight may be seriously damaged when high levels of coherent light impinge upon one's eyes. In order to protect against this, a visor or windshield is equipped with a first layer of photosensor segments respectively and optically aligned with corresponding light-blocking segments which take the form of LCD material or photorefractive glass. Wherever light impinges upon photosensor elements, at levels above a preselected threshold, the corresponding light-blocking segments are switched to a light-blocking mode. The end result is the blocking of harmful light in only those portions of an entire field of view where harmful levels of light radiation exist.

Abstract: A variable transmittance optical component includes an electrochromic material and a photovoltaic device-type thin film solar cell deposited in a tandem type, monolithic single coating over the component. A bleed resistor of a predetermined value is connected in series across the electrochromic material and photovoltaic device controlling the activation and deactivation of the electrochromic material. The electrical conductivity between the electrochromic material and the photovoltaic device is enhanced by interposing a transparent electrically conductive layer.

Abstract: A pair of spectacles to be worn by a golfer to facilitate the alignment of a golf ball with a target includes two optical elements supported by a spectacle frame a having a ark, tinted upper region and a clear lower region. The regions are separated by two parallel but non-aligned lines, each inclined to the horizontal by between 5.degree. and 15.degree.. The lines are oriented downwardly from left to right, as seen from outside the spectacles, in a pair of spectacles for a right-handed person and from right to left in a pair of spectacles for a left-handed person. The two lines are situated in front of respective eyes when the spectacles are in use and are offset vertically relative to each other by a distance of the order of 2 mm.

Abstract: In a pair of eyeglasses with filter lenses, each filter is mounted in a ring shaped in the form of a prone U whose opening is directed toward the center of the ring. The ring is contained within an outer ring connected to the eyeglasses mounting frame. A manipulating device comprising a molded member is located inside the ring in a recess formed in the periphery of the filter lens. The outer ring has a semicircular slot permitting the angular displacement of a positioning rod, which is integral with a piston slidably mounted in a recess against the action of a spring. One end of the rod is integral with a gripping member, while the other end is engageable in one of the positioning openings formed through one limb of the shaped outer ring.

Abstract: A lens and a pair of glasses incorporating the lens wherein each lens has first and second lens elements, preferably formed of mineral glass, with a bigradient coating deposited on the inner surface of the first lens element by a vacuum coating process. The lens elements are laminated together with a polarization film therebetween and have an anti-reflectant coating preferably on the outer surface of the second lens element. Waterproof coatings may be formed on the anti-reflectant coated outer surface of the second lens element and the outer surface of the first lens element.

Abstract: The present invention provides a sunglass lens having a central region which is provided with an ultra-violet screening agent to protect the eye while the surrounding regions of the lens have little or no screening agent so as to permit tanning of the skin around the eye. In a preferred embodiment, the lens is additionally colored with tint, the darkness of which may vary over the surface area of the lens. In addition, the variation of tint over the surface of the lens is different from the variation of the ultra-violet screening agent. For example, the ultra-violet screening agent is most highly concentrated in the central portion of the lens whereas the colored tint is most highly concentrated around the periphery of the lens.

Abstract: The article includes an eyeglass frame (12) and two lenses (14, 16). Each lens has a film (18,20) on one surface thereof which is changeable between an opaque condition and a transparent condition, controlled by an electrical circuit (22).

Abstract: A visual aid for nighttime driving of automobiles having an exterior side mounted rear vision mirror wherein a driver tends to be subjected to headlight glare directly from oncoming automobiles and headlight glare reflected by the mirror from following automobiles, having a frame, and a supporting assembly, including a glare reduction arrangement which includes a direct glare portion and a reflected glare portion for reduction of light transmission therethrough. A lens arrangement including the glare reduction arrangement and a frame mounted blocking portion of the glare reduction arrangement may also be used.

Abstract: A method of reducing the impact of a reading deficiency caused by a slow transient response comprises the steps of inserting a light diffuser in a reader's light path to attenuate the high spatial frequency information mediated by the cone receptors of the eye(s) of the reader, and inserting a chromatic filter which limits stimulation to the red and/or green cone receptors relative to stimulation of the blue cone receptors in the eye(s) of the reader whereby the magnitude of the cone mediated sustained response of the reader is reduced towards a more normal balance relative to the impaired transient response of the reader. An apparatus for reducing the impact of a reading deficiency caused by a too slow transient response of a reader comprises a light diffuser and a chromatic filter to limit the red and/or green mediated sustained transmission relative to the blue cone mediated transient transmission, the diffuser and filter being locatable in the reader's light path.

Abstract: Reading glasses including side view blocking temples and opaque lenses have narrow horizontal slits for reading focused text while blocking peripheral distractions. The glasses are internally illuminated with uniformly brightly-colored luminescent material to compensate for light deprivation caused by the blocking. In a described embodiment, the opaque lenses are made by applying black pigment to standard prescription lenses and glow-in-the-dark material is applied to the inside of the lenses.

Abstract: Eyeglasses to aid a wearer, especially athletes or participants in sports, to diminish the input from his or her occulo-vestibular reflexes and provide immediate visual feedback concerning alignment while he or she is performing any motor coordinated skill or movement. More particularly, the eyeglasses have one or more substantially straight visible transparent lines on one or both of the eyepieces which appear to be superimposed on the view through the line or lines. Each line is substantially parallel to the horizontal or vertical axis of its eyepiece. This line or lines enable the wearer of the eyeglasses to readily check alignment of the body, head, hands and/or a held object with a viewed object, e.g. a golf ball, a pitched baseball, a bowling pin, a basketball, etc. and aid the wearer to make alignment corrections if necessary.

Abstract: A training system for rehabilitation of hemianopsia patients, including a first training device adapted to be placed before the eyes of a hemianopsia patient during a first phase of training, said first training device having blocking means for substantially blocking the passing of light therethrough, and transmitting means for substantially passing light therethrough, said blocking means being disposed in the part of the field of vision outside of the scotoma, and said transmitting means being disposed in the part of the field of vision in which there is no longer any vision due to the scotoma and a second training device adapted to be placed before the eyes of a hemianopsia patient during a second phase of training, said second training device comprising disposed before each eye means for transmitting light, the means for transmitting light before one of the eyes having applied thereto an indicator mark ranging from the boundary of the scotoma and the functional visual field toward the edge of the scotoma t

Abstract: A method and apparatus for improving visual acuity during sports activities includes the steps of increasing the strength of the image on the brain half corresponding to the weaker eye of a person by substantially occluding ambient light to the dominant eye of the person for a period of approximately one to two weeks for at least one hour per day; forcing both brain halves to operate at substantially equal visual levels in coordination with each other by wearing eyeglasses having inner opaque sections adjacent the nose bridge so as to limit overlapping vision of the two eyes to a small overlapping area, the inner opaque areas being inwardly and downwardly inclined at an angle of approximately 20 with respect to a nasal axis extending through the nose of the person; and forcing both brain halves to operate independently of each other at substantially equal visual levels by increasing the areas of the opaque sections so as to eliminate the overlapping area, which forces each brain half to process the visual inf

Abstract: An optical instrument comprises a housing having a viewing aperture at the proximal end and an opening at the distal end for entry of light. A body in the housing rotates on an axis normal to the optical axis. The body has a pair of segments having linear edges parallel to the plane defined by the axis of rotation and the optical axis. As the body rotates in one direction both edges advance toward the plane, and as the body rotates in the opposite direction the edges diverge from the plane. Preferably the body comprises two sections of a circular cylinder coaxial with the axis of rotation, the segments approximately about ninety degrees each about their common axis of rotation. The edges of the members define the opening for admission of light for viewing at the viewing aperture, and may reduce or enlarge the opening according to the positioning of the members.

Abstract: An eyeshield for covering an eye that is being treated for some medical problem, so as to shield the eye until such time as it has healed. The eyeshield includes a substantially firm but bendable foraminous member having a concave interior surface that is adapted to be juxtaposed with the eye--to create a kind of shallow "vault" over the eye. The preferred material for the foraminous member is a sheet of 6061 aluminum alloy having a thickness of about 0.025 inch. The member has a peripheral edge or rim having the general shape of an ellipse, with a major axis of about 3 inches and a minor axis of about 2.4 inches. The eyeshield also includes a relatively thick but lightweight border that is permanently mounted around the rim in such a way as to completely envelop the same.

Abstract: An improved golf aid which consists of a pair of shaded glasses having a slit horizontally located across both lenses and an adjustment assembly for moving the lenses toward and away from the golfer's eyes. The width of the slit is such that when the golfer has the glasses on, and is looking at the golf ball, he sees a defined path going from the golf ball to a target area. As the golfer looks down and addresses the ball, for example, when putting, he sees extending from the ball to the hole a clear path. The golfer will keep his head steady such that the path defined by the slits will define a fixed path from the golf ball to the target area and a fixed path for the golf club head to follow. The golfer will then stroke the golf ball in line with the path defined by the slits.

Abstract: A spatial light modulator includes a photosensor diode and a photoemitting diode array, each having two semiconductive layers of opposite electrical polarities, and which are sandwiched together with layers of the same polarity (P or N) in electrical contact with each other. Transparent electrode layers are formed on the opposite surfaces of the photosensor diode and photoemitting diode array respectively, in electrical contact with the layers of the opposite polarity. The individual photoemitting diodes are electrically and optically isolated from each other. With a voltage applied across the electrodes which causes the photosensor diode to be reverse biased and the photoemitting diodes to be forward biased, the photoemitting diode array generates a visual display which is a reproduction of a light image incident on the photosensor diode. The photosensor diode may be replaced by a single layer of a photoconductive material.

Abstract: In an optical toy device and a method of manufacturing the same, a frame for eyeglasses is cutout of a blank which is provided with two pairs of holes aligned with each other and is coated with a vinyl material on a side thereof. Adhesive is applied to the reverse side of the blank, and two feathers are attached to its reverse side to overlap two holes on one half of the blank and form with the holes eyepiece lenses. The blank is folded at its backside together so that its halves are glued to each other. The frame having two eyepiece lenses are formed thereby. A temple bar folded to form thereon two hinges is heat-sealed to the frame. The feathers are attached to the frame in such fashion that the barbs of the feather overlapping one hole for one eyepiece are angularly oriented with the barbs of the feather overlapping another hole for the other eyepiece to produce an X-ray image of an object to be viewed.

Abstract: A shade attachment for eyeglasses includes a frame defining a pair of openings dimensioned for registry with lenses of a pair of conventional eyeglasses. Top and bottom resilient clips are provided on the frame and are configured for frictional engagement with top and bottom edges of eyeglass lenses. A set of transverse slats are mounted on the frame and extend across the lens openings. The salts are mounted for movement between open and closed positions by a linear drive train including a plurality of driven gears secured to axle shafts of each of the slats. A plurality of idler gears are mounted for rotation on the frame between and in mesh with each adjacent pair of driven gears. A drive gear is mounted for rotation on the frame and in mesh with one of the driven gears. A control knob is provided for manually rotating the drive gear to simultaneously open or close all of the slats extending across one of the frame openings.

Abstract: An auxiliary eye protection assembly made up of a left and right side, adapted to clip on to or be made a part of spectacles, pivotal to any position in front of, below, or above the eyes, allowing unhindered viewing of the surrounding area by the sunlight, lights, their reflective rays, man made or natural. This invention is also for the use of advertisement and spectacle stands, holding the eyeglasses up off the resting surface whether it is sand, grass, pavement, etc.

Abstract: The present invention relates to an improved device for use in the detection and identification of various misalignment conditions of the eye, for example heterophorias, strabismus and the like. The device, in its preferred embodiment, includes a unidirectional occluder having an occluding disk which occludes an individuals sight in one direction through the disk while allowing direct observation of the occluded eye from the other side of the disk. Preferred embodiments include a self contained hand held support having a handle region and an occluder region, the occluder region being of the size effective to occlude vision of a fixation target through one or both eyes, the disk formed of a reflective transparent material mounted within the occluder region, a light source positioned on one side of the disk so as to illuminate the side of the disk when energized, and a mechanism contained within the support for energizing the light source, the energizing mechanism including a switch mounted on the support.

Abstract: A method and lens are disclosed for improving the visual comfort and perceived vision of a person viewing an image transmitted from a video display terminal. The use of a lens tint complementary to the image color on the terminal screen is employed to improve screen contrast and reduce fatigue.

Abstract: A pair of louvered sunglasses includes a frame having a front piece with a pair of lens openings therein and a pair of temples attached to the front piece. A plurality of elongated louvers are horizontally mounted in each front piece opening and rotatably supported in each vertical edge of the front piece. Each louver has a small shaft on each end riding in an opening along each vertical edge of the frame front piece and each louver has an arm protruding therefrom and each arm of each louver in each opening being connected by a connecting member. The connecting member is connected to a rotating shaft passing through the top of the frame front piece so that rotating the shaft rotates all of the louvers simultaneously.

Abstract: Eye gear is provided to protect a wearer from irritating direct sunlight. Liquid crystal matrices are positioned over the wearer's eyes and a sun-tracking photosensor and related electronics determines the area of direct sunlight within the viewer's field of view. Segments of the matrix corresponding to the sunlit area are switched to a light-blocking state so that the remaining unaffected field of the view may be maintained.

Abstract: The visual apparatus makes it possible to limit the instantaneous luminous intensity without reducing the field of vision and comprises a plate with an opaque surface having a transparent slot, a support (2) on which said plate is mounted, said support bearing on part of the body of said person, said plate thus being placed in front of an eye of said person and a scanning means (8) connected to said plate for scanning the opaque surface of said plate by said transparent slot. The apparatus is used more particularly as medical spectacles in the case of cataracts, or as sunglasses.

Abstract: This invention provides anti-glare eyeglasses for drivers for shielding the glare of on-coming headlights and the glare of headlights of following vehicles reflected in rear view mirrors. The central vision area is bordered by a shaded area on the left side, the edge of the shaded area next to the central vision area is vertical and straight, the shaded area extends to the left at an angle corresponding to the apparent angle at which the on-coming headlights pass to the left of the driver, and additional shaded areas are provided to the left and right for screening the headlight glare of following vehicles reflected in rear view mirrors. The shaded areas may be reversed for use by drivers driving on the left side of the road. The invention also provides a kit of parts of attachable shaded shapes which can be placed on regular eyeglasses to correspond to the eyeglasses of this invention.

Abstract: Protective apparatus for shielding the eyes against the entrance of foreign matter. The apparatus includes a one-piece molded plastic visor which is formed of resilient material and includes a brim having an inner surface for engaging the forehead. The visor further includes a bill extending outwardly with the visor having first and second spaced legs extending rearwardly from the brim for compressively holding the head therebetween. The legs and the brim form a spring system which permits resilient deflection of the legs. The protective apparatus further includes a transparent shield dependent from the brim for overlaying the eyes. The shield includes a first end positioned adjacent the first leg and a second end disposed adjacent the second leg with an upper surface extending intermediate the ends and positioned closely adjacent the bill. The apparatus additionally includes a connection for fixably holding the shield to the brim.

Abstract: A frame (1) includes means (3) for being held in front of the eyes, and means (6) for supporting and guiding the displacement of a moving opaque element (7) such as shutter movable between a central position in which it leaves binocular vision free, and two opposite side positions preventing vision via one or other of the eyes when the head is tilted.

Abstract: An eye shield that effectively blocks ultraviolet rays is incorporated in a pair of ordinary eyeglasses. The eye shield comprises a combination of a coating or layer of light blocking material on the inner surfaces of the eyeglass lenses and a coating or layer of light reflecting material on the outer surfaces of the eyeglass lenses. This combination of light blocking material and light reflecting material results in zero light transmission through the eyeglass lenses.

Abstract: A night driving dazzle protection system uses anti-dazzle screening material transmitting less than 40% of incident light and arranged on screened portions of right and left eyeglass regions 30 and 20 in front of a driver's eyes. As viewed by the driver, the eyeglass region 20 in the view of the driver's left eye is screened between about 7:30 o'clock and about 9:00 o'clock, and the corresponding eyeglass region 30 in the view of the driver's right eye is unscreened between about 7:30 o'clock and about 9:00 o'clock. Preferably, right and left eyeglass regions 30 and 20 between about 3:00 o'clock and about 4:30 o'clock are screened for the driver's right eye and unscreened for the driver's left eye. Also, upper portions of each of the eyeglass regions are preferably screened from about 9:00 o'clock to about 3:00 o'clock.

Abstract: A viewer for producing the illusion of three-dimensional images from two-dimensional moving image displays which includes a spectacle-like support having a frame and lateral bows on the frame for engagement with the ears of the user. The frame is made of opaque material in which a rectangular opening is provided for each eye of the user. Forwardly extending, tubular light shields are carried by the frame around each rectangular opening. Band pass light filter within the rectangular openings permit one eye to see only with cone vision the other eye only with rod vision.

Abstract: Lenses of allyl-N-ethylene glycol carbonate having enhanced resistance to scratching or abrasion can be formed by preparing a substrate of a polymer or copolymer of allyl-N-ethylene glycol carbonate, the substrate being at least partially polymerized. A thin film of a copolymer of allyl-N-ethylene glycol carbonate and of an allyl monomer is formed by overmolding on the substrate and polymerized.

Abstract: A visual corrective device is provided in the form of a visual field occluder or lens occluder for use with a pair of eyeglasses. A generally flat pocket-like enclosure is formed from first and second gores of a soft flexible material joined along the bottom or base portion to form an envelope enclosure. The base portion is contoured with a curvature to accommodate and generally conform to the base of a lens frame portion and lens of a pair of eyeglasses. The gores forming the envelope enclosure are open at the top for sliding the enclosure from below over a lens frame portion and lens of the eyeglasses. The enclosure is constructed and arranged with side openings in the form of first and second notches between the gores extending downward from the top of the gores and meeting the joined base of the enclosure.

Abstract: System, method and apparatus wherein eyewear is provided particularly suited for use in conjunction with luminescent displays such as visual display terminals and which serves to improve operator performance and reduce asthenopia. The eyewear includes a forward frame portion having a centrally disposed bridge section and right and left temple pieces extending from the frame portion. The frame supports a clear optical region dimensioned for intercepting lines of sight substantially only within the inferior field of view of the user's eyes and a translucent region intercepting and blocking lines of sight directed substantially outwardly from the mid pupillary position of the user's eyes within the superior field of view. Preferably, the clear optical region is pigmented to define an optical filter and this filter preferably is selected having a pigmentation in the yellow portion of the visible spectrum.

Abstract: A golfer's aid is provided in the form of a translucent sheet having two transparent crosses thereon wherein the center of the crosses corresponds with the separation of a user's eyes, and a pair of vertical and horizontal slots, respectively, above and at the outer sides of said crosses, said sheet being pivotally supported by extension arms well in front of the user's eyes.

Abstract: There is disclosed a simulator for simulating a reduced peripheral field of view for the eyes of a normal user. The simulator consists of a frame having a front section upon which two eye pieces or binocular tubes are mounted. The frame has adjustable temple pieces which are adjustable in the horizontal direction and are adjustable to provide an angle with respect to the vertical so as to adjust the tilt of the frame when it is being worn by the user. Each binocular tube is associated with a variable iris diaphragm which enables the practitioner to adjust the opening to thereby simulate a different field of view according to the particular visual defects associated with a handicapped user. The simulator has left and right shields depending from the temple sections to prevent side vision when the frame is being accommodated by the user. In employing the simulator the device will provide an accurate replica of a reduced field of view such as that existing in a patient having tunnel vision.

Abstract: An optical grid for correcting optical defects in either natural or artificial lenses comprises two perpendicularly arranged series of dark and opaque bars integrally connected to each other in order to form an integral network, all of said bars having a triangular cross section with the base of the triangle facing said lens and the vertex away from said lens, so as to form square openings in said grid having their smaller areas facing said lens and their larger areas away from said lens, the ratio of said smaller areas to said larger areas being of from 1:36 to 1:2.25, preferably 1:4, said smaller area of each square opening being of from 0.04 to 4 mm.sup.2, preferably 1 mm.sup.2, and said bars being 1 mm wide.In order to provide more luminosity, the grid is externally coated with a mirror-type reflecting coating or two large rectangular windows are provided laterally and away from the line of vision of said lens.

Abstract: In anti-glare spectacles comprising a frame and a pair of lenses, each lens comprises a substantially circular central zone of substantially complete transparency and an adjoining light-absorbing annular zone over an angular range of substantially 45.degree. in which the light absorption increases sharply from the inside of the annulus and drops towards the outside of the annulus by the square of the angle. An outer zone of each lens has a low absorption.

Abstract: A light shielding material having a gradient of the luminous transmittance in the vertical direction and comprising at least two regions consecutive to each other and different from each other in the luminous transmittance is provided. The luminous transmittance of one region is in the range of from 30% to 75% and the luminous transmittance of the other region is up to 25%, and said other region includes a portion in which the difference of the luminous density is at least 0.35 per 10 mm of the distance in the vertical direction. This light shielding material is advantageously used for glare-reducing glasses, glare-reducing filters, visors and the like.

Abstract: A device for preventing the eyes from being dazzled by the lights of an oncoming vehicle comprises a spectacle-type frame which carries anti-dazzle lenses having parallel, non-transparent, light-intercepting layers which are inclined forwardly and downwardly. The angular position of the lenses can be adjusted about a horizontal axis to provide the required anti-dazzle effect.

Abstract: A spectacle-type frame has a pair of open frame portions with a first alignment bar mounted across them by means of which a golfer wearing the frame lines up the direction of travel of a golf ball between an adjacent point and a distant point. A pair of second alignment bars extend at right angles to the first alignment bar at the respective open frame portions. These second alignment bars form a single focus line with the golfer's eyes and the golfer lines up the face surface of a golf club with such focus line for causing a golf ball when struck to travel accurately along the line determined by the first bar. The first alignment bar is adjustable for positioning it in proper alignment with the golfer's eyes and the second alignment bars are adjustable to provide the common focus line with the golfer's eyes.

Abstract: A selective optical filter, intended to be placed before the eyes for protection and for improvement of vision, features a plurality of different light absorption zones comprising a central zone which is completely light permeable, or has low light absorption capability, a zone surrounding this central zone which is light permeable but has a relatively high light absorption capability, the said zone being included between the periphery of the central zone and a cone having its apex at the optical center of the eye and an included angle of between about 15.degree. and 30.degree., and the outer periphery of the zone adjoining a further zone of low light absorption capability corresponding to the peripheral part of the retina.