Abstract: The apparatus for measuring differences in the transmission of light through a lens of an eye is an eye chart has two main sections including a test section that displays a shade of a test color and a reference section that displays either a spectrum of shades, or a different shade of, the test color. The chart is displayed in a box, projected on a wall or displayed as a chart hung on a wall. The chart is illuminated using a constant or variable intensity light source. A patient is required to find or make a match between the shades disposed on the chart. When the variable intensity light is used, the patient will be required to adjust the light intensity of the section it illuminates until a match in color shades is made. The chart may be used in conjunction with a Snellen eye chart.

Abstract: The safety eyewear includes a one-piece molded lens frame, and left and right temple bar assemblies. The one-piece lens frame includes a brow bar portion, a central bridge portion, a nose piece portion, and left and right lens frame eyewires that cooperate with the brow bar and bridge to define left and right lens openings. An over-molded elastomeric material is also used to provide soft bumpers in the inner side of the brow bar and a soft cushion on the inner surfaces of the nose piece. The creative and selective use of the over-molded material thus provides both decorative and aesthetic features while also providing functional cushioned areas.

Abstract: A method is provided for securely holding a spectacle lens. Without using screwing members such as a screw and a nut, and extra parts such as a bush, a cylindrical pin and a slip-off preventive pin, a spectacle lens can surely be held. A taper pin is provided projecting on a lens holding member for holding a lens and a taper hole having approximately the same size as the taper pin is provided on the spectacle lens. The taper pin is directly press-fitted into the taper hole, thereby holding the spectacle lens by a press-contact between an inner circumferential surface of the taper hole and an outer circumferential surface of the taper pin. The taper pin is press-fitted in a thickness direction of the spectacle lens.

Abstract: A head mounted display (HMD) is worn on a user's head for displaying an image. A HMD is a personal see-through device designed to view still or video images or data that nonetheless permits the user to view his surroundings.

Abstract: A spectacle set includes a primary spectacle and a detachable shelter frame. The primary spectacle includes two lenses, a primary bridge extended between two inner sides of the lenses respectively. The detachable shelter frame includes two shelter lenses, a shelter bridge extended between two inner sides of the shelter lenses, and a mounting arrangement comprising first through third supporting members spacedly and rearwardly extended from the shelter bridge to engage on the primary bridge so as to support the shelter lenses aligning with the lenses respectively, and a retention member rearwardly extending to apply an urging force against the primary bridge to engage with the primary bridge when the detachable shelter frame is mounted in front of the primary spectacle so as to substantially retain the detachable shelter frame in a balance manner.

Abstract: A line-of-sight detection method in an imaging system which includes a camera for photographing a face and right and left eyes and a light source for irradiating the right and left eyes with infrared rays, said line-of-sight detection method comprising: obtaining a center point of a pupil of at least one of the right and left eyes; obtaining a center point of a cornea spherical surface of said at least one of the right and left eyes; and obtaining a direction of a vector headed from said center point of said cornea spherical surface to said center point of said pupil, wherein a data based on a morphological information is used in obtaining said center point of said pupil.

Abstract: An apparatus (10, 10?) for detecting the surface topography of a cornea (24) of an eye (22) by dynamic or static projection of a pattern onto the surface of the cornea and detection of the pattern reflected by the cornea, providing preferably simultaneous detection of at least one optical property of a layer disposed beneath the cornea.

Abstract: An endpiece (E) is composed by disposing a pair of elastic inner and outer wiring or plating parts in juxtaposition. An outer part external member (1) is adopted to keep a shape and structure of the endpiece (E) intact and reinforced. The inner part is a buffer piece (2) doubled back into a hairpin shape and has at least a first bending portion (21) of convex shape and a second bending portion (22) of concave shape. When a temple (T) is unfolded to excess, the first and second bending portions (21) and (22) flexibly bend towards a direction to which those portions expand so as to counterbalance stress to which the external member (1) is subjected.

Abstract: An autoclavable and sterilent-resistant ophthalmoscopy lens system having a plastic contact lens, and at least one image forming lens element. An ophthalmoscopy lens system having a contact lens element, an image forming lens and a retaining ring is also provided.

Abstract: An auxiliary eyeglass frame is provided with a position-adjustable device pivotally securing to the bridge. The position-adjustable device includes a mounting block, at least one magnetic piece is provided in the mounting block, two through bores are respectively provided adjacent to the left side and right side of the at least one magnetic piece, each through bore is provided to receive one fixing piece and one pivotal connecting article, and the pivotal connecting articles are disposed on the bridge of the auxiliary eyeglass frame.

Abstract: A novel hinge assembly for eyeglasses is provided wherein a first structural member for the hinge structure is formed in a first molding step and a second structural member of the hinge structure is formed directly over a portion of the first structural member in a second molding step. The present invention utilizes in-mold-assembly techniques to reduce the assembly steps required to form such a hinge assembly while further resulting in a hinge assembly that has increased adjustability and utility. Specifically, the overmolded components form a ball and socket type joint allowing a large degree of lateral rotation in one direction and a limited amount of freedom in a second direction. This hinge allows the temple portion of the eyeglasses to be folded against the brow bar and the inclination angle between the temples and the brow bar to be adjusted.

Abstract: A pair of multi-purpose eyeglasses comprises a main frame made from metal and including a lens holder for holding lenses, a pair of temple arms connected to both sides of the lens holder, and a pair of nose pads connected through a pair of pad arms to middle portions of the lens holder, each of the pad arms having a pad arm groove formed on a lens-side of the pad arm, the pad arm groove having a stepped portion formed therein; an inner frame detachably assembled with an inside of the main frame, the inner frame having inner frame grooves formed on middle portions of the inner frame corresponding to the pad arm grooves; and a sealing member attached to an inside of the inner frame, the sealing member including a sponge portion and a leather portion attached onto the sponge portion.

Abstract: In a pair of glasses, in particular industrial safety glasses, comprising a frame with side pieces which are articulated thereto by a side-piece projection; and two eyeholes with encircling grooves and sight pieces inserted in the grooves; the frame being divided in the vicinity of the eyeholes for expansion and exchange of the sight pieces and lockable in the closed position; and the frame being divided in the vicinity of the side-piece projection; it is provided that the side-piece projection, in prolongation of the divided area of the frame, is divided into a top projection of the top frame member and a bottom projection; and that a pivoted locking device is pivotably mounted on the top projection of the frame member and lockable in place by the bottom projection.

Abstract: A flexible auxiliary clip-on frame for tension mounting to a mating or primary spectacle frame. The clip on may be used to house sunglasses or any other frames necessary. The primary spectacle frame does not have to be constructed with any special features in order to mate with the auxiliary clip-on assembly. The primary spectacle frame assembly has the typical eyewear components including the eyerim, end pieces, rimblocks, bridge, temple, and optionally, nose pieces. Due to its flexible nature, the entire body of the auxiliary clip-on assembly acts as a spring. The spring-like qualities of the auxiliary clip-on assembly are used to securely fit the auxiliary clip-on assembly onto the primary spectacle frame assembly through the use of end piece retainers, without the need for magnets or any other fixture.

Abstract: The invention is directed to a reinforced nose bridge structure, eyeglasses employing the reinforced nose bridge structure, and methods of making reinforced nose bridge structures and eyeglasses. A reinforced nose bridge structure includes an elongated body and a wire extending along the body for most of its length. The ends of the wire project from the body to form a pair of spaced-apart nose pad supports. Respective nose pads are mounted at the ends of the wire forming the nose pad supports. The nose bridge may be attached directly to eyeglass lenses or to complete or partial frames for the lenses.

Abstract: The present invention is directed to a removable magnetic clasp for eyeglasses. The eyeglasses have a right temple bar and a left temple bar pivotally attached to an eyeglasses frame body. The magnetic clasp comprises: a first connector and a second connector; a first magnet being positioned on the first connector and a second magnet being positioned on the second connector. A channel extends through a portion of each connector and the channel is configured to so as to allow a temple bar to slide through the channel. The removable magnetic clasp, when attached to eyeglasses, allows for the first and second magnets to remain in attractive magnetic communication when the temple bars are closed but separated by clothing material, the attractive magnetic communication imparting a gripping force on the clothing material sufficient enough to substantially prevent relative movement between the temple bars and the clothing material.

Abstract: A eyeglasses retaining device for headware, having a unitary fastener for the headware and the eyeglasses is described. The retaining device may optionally have designs or advertising or other messages on a portion visible to others.

Abstract: A flashing dot is alternately shown in the left image and right display of a binocular device at short intervals so as to allow a user to detect the misalignment in the displays. If misalignment occurs, the user sees a dot moving between two locations. The user uses a device or a software program to move the dot for minimizing the apparent movement until a single stationary dot is observed.

Abstract: A polarizing beamsplitter is provided, comprising two wedge-shaped prisms of a birefringent material, the prisms forming a plan-parallel plate, wherein an incident light beam is separated into two partial beams being arranged parallel to the incident beam when emerging from the beamsplitter, the partial beams having a lateral distance with respect to each other, which is continuously changeable.

Abstract: An eyeglass device includes a primary frame and an auxiliary frame for receiving two primary lenses and two auxiliary lenses respectively. The primary frame includes two brow portions and two primary magnetic members disposed respectively on the two brow portions or on top edges of the two primary lenses. Each of the primary magnetic members has a magnetic surface facing upwards or downwards or rearwards. The auxiliary frame includes two brow portions and two auxiliary magnetic members disposed respectively on the two brow portions or on top edges of the two auxiliary lenses to be mutually magnetically attachable with the two primary magnetic members.