Abstract: Safety eyewear is presented which is provided with particulate sealing around the inside periphery of the lens/lenses and having temples that provide adjustment of the eyewear to a pantoscopic angle. The eyewear is provided with an adjustable strap assembly for better fit to the wearer's head. The eyewear lens/frame includes a plurality of projections that define various pantoscopic angles. The temple end piece includes a set of recesses that engage the projections formed on the lens/frame which temple end piece is rotated relative to the lens/frame to set the pantoscopic angle. The adjustable strap assembly further adjust the fit of the eyewear and can be unbuckled for snaplocked attachment of the eyewear directly to other safety equipment such as noise suppression ear muffs, communication head phones, breathing masks and the like.

Abstract: A method for mounting safety shields onto eyeglass temples and a kit for carrying out that method. A temple of an eyeglass frame is placed in a channel forming part of a side shield thereafter, a screw is inserted into an opening formed in the side shield and into a member affixed to the temple to create a fastened fit between the temple and the channel which attaches the side shield to the temple. The side shield is placed in its operative position before the screw is inserted into the opening and the fastened fit results from the insertion of the screw into the opening and member which holds the side shield in its operative position. The kit includes a side shield having a longitudinally extending channel into which a longitudinally extending eyeglass temple may be inserted. The channel has an open lateral end through which the temple may be inserted and a supporting lateral end against which the temple may be supported.

Abstract: An elastic device for an eyeglasses frame is contained in a center deep opening of a center deep opening formed in each of two ends of a frame and pivotaly connected to a front end of each of two temples so that the temples may be automatically adjusted in its tightness relative to the frame. Then the frame may be worn by users having faces of different size. Further the shape of the temples may be alterable according to the configuration of a frame.

Abstract: Eyewear having a temple that provides for adjustment of the temple length and adjustment of the pantoscopic angle of the eyewear. The eyewear lens includes a plurality of projections that define various pantoscopic angles. A temple endpiece includes a set of recesses that engage the projections formed on the lens. The temple endpiece is rotated relative to the lens to set the pantoscopic angle. A groove is formed in an endpiece head to allow distal ends of the head to flex away from the lens and reduce the pressure on the lens.

Abstract: An eyeglass assembly has a pair of temples, each of which passes through an aperture in a lens. The temples are bent, and the holes oriented, such that the temples can pivot about the portion passing through the hole, allowing the temple to rotate between a wearing position and a storage position.

Abstract: Glasses with automatically extended temples comprises a pair of fronts which are interconnected by a bridge and a pair of temples which are connected to each of the fronts. The temple includes an elbow which is fixedly connected to each of the fronts. The elbow includes an upper hoop and a lower hoop serving as pivotal mounting rings for connecting a rear temple portion thereof. The temple further includes a rear temple portion which is provided with an U-shape connecting portion having an upper mounting leg and a lower mounting leg. Wherein each of the legs the connecting portion can be pivotally and suitably connected into those two upper and lower hoops respectively by inserting the upper and lower mounting legs into the upper and lower hoops. Once the glasses are withdrawn from the receiving box, the two rear temple portions will automatically extend for easy and convenient usage of the glasses.

Abstract: A temple assembly pivotably mounts to a lens holding frame of spectacles. The temple assembly has a first temple portion having a pivot member for pivotably attaching to the lens holding frame and an abutment for engaging the lens holding frame to restrict outward pivoting of the first temple portion away from the lens holding frame. A second temple portion is provided having a first end portion with an ear engaging section and a temple shaft slidably engaging the first temple portion. The first temple portion includes a receiving tube for slidably receiving the temple shaft therein through a first end opening. The pivot member has a hinge shaft with a pivot lug pivotably attachable to the lens holding frame. The hinge shaft is slidably received in the receiving tube through a second end opening of the receiving tube.

Abstract: A method for mounting safety shields onto eyeglass temples and a kit for carrying out that method. A temple of an eyeglass frame is placed in a channel forming part of a side shield thereafter, a screw is inserted into an opening formed in the side shield and into a member affixed to the temple to create a fastened fit between the temple and the channel which attaches the side shield to the temple. The side shield is placed in its operative position before the screw is inserted into the opening and the fastened fit results from the insertion of the screw into the opening and member which holds the side shield in its operative position. The kit includes a side shield having a longitudinally extending channel into which a longitudinally extending eyeglass temple may be inserted. The channel has an open lateral end through which the temple may be inserted and a supporting lateral end against which the temple may be supported.

Abstract: Eyeglasses includes a lens frame, two temples and two connecters for connecting the lens frame with the temples. The lens frame has a slot in each of two side ends to fit firmly with an intermediate small wall of a connecter between two parallel walls, and each temple is pivotally connected with each connecter. Then the lens frame and the two temples are indirectly assembled with each other, and easy to be altered for changing an outer appearance of the eyeglasses.

Abstract: Low cost and portable safety side shields for safety eye glasses which substantially protect eyes from harm caused by projectiles impacting the eye through open areas between the wearer's head and the eye glass frames. The side shields have no conducting parts, are resistant to impact, shattering, and chemical corrosion, and are securely fastened to the ear pieces of the eye glasses by a stretchable tube. The side shields fit inside of the ear pieces without touching the eye glass wearers face, and overlap portions of the top, side and front of the lens frames to prevent latitudinal, longitudinal and rotational slippage that would expose the eyes. An alternative embodiment provides further eye protection by partially overlapping the front of the lens frames in the area of the eye glass hinges.

Abstract: The frame for spectacles without surround comprises: a pair of arms (3); for each arm, an element (7) for connection to the respective lens (L); an intermediate bridge (5) for the connection of the two lenses (L); a pair of pads (31) for support on the nose; means for locking the bridge and the connecting elements to the respective lenses. Advantageously, the connecting elements (7) each exhibit a first bent end forming a helical spring (7A) intended to be inserted in a corresponding hole (LF) of the respective lens (L); the locking means comprise, for each lens, a screw (15) inserted coaxially in said spring.

Abstract: An eyesight and hearing safety apparatus for use by a human being. The apparatus comprises a front guard portion including a front transparent panel for protecting the eyesight of the human being. The apparatus further comprises a first and a second earplug for protecting the hearing of the human being. The apparatus further comprises a first temple having a first attachment end and a first support end. The first attachment end is hingedly attached to one end of the front guard portion. The first earplug is attached to the first temple adjacent the first support end. The first temple and the first earplug support the front guard portion from a respective auditory canal when the human being is wearing the apparatus. The apparatus further comprises a second temple having a second attachment end and a second support end. The second attachment end is hingedly attached to one end of the front guard portion. The second earplug is attached to the second temple adjacent the second support end.

Abstract: A device for interconnecting and pivoting two components of eyeglasses or protective elements for sports use. The device is constituted by a single flexible body that is detachably associable at at least one hole formed on one of the two components. The single body is provided with temporary engagement elements for the other one of the two components.

Abstract: A connecting device, particularly usable for eyeglasses, having two elements that are rotatably associable to each other and can be detachably connected to two separate components of the eyeglasses, at least one of the components being made of a material that cannot be welded to the device, such as aluminum. It is thus possible to produce aluminum or carbon fiber eyeglasses without welds.

Abstract: A unique unitary lens for eyewear includes right and left lens regions formed of substantially spherical portions. The lens provides improved aerodynamics, aesthetic appearance and eye protection for sport eyewear applications.

Abstract: Eyeglasses having a lens-carrying frame and temple pieces mounted to the lens-carrying frame, the temple pieces including a temple block hinged to the frame, ear pieces, and, between the block and the ear pieces, a segment mounted on the hinge block, but rotatably mounted with respect to the frame. The rotatable section can be made in various shapes, or imprinted with various different decorations on different sides, or made varicolored.

Abstract: A frame for rimless spectacles is provided which has no protuberances projecting from both surfaces of lenses, provides an improved effective field of view, and can be fabricated with ease. Blind holes are formed in nose- and temple-side edge surface portions of each spectacle lens, respectively. A pin-like projection is formed on each of nose-side and temple-side contact plates, and is inserted and fixed in the corresponding blind hole by using an adhesive.

Abstract: The coupling system 1 is composed of an elongated piece shaped, on one side to form a claw, the members (10a, 10b) of which are designed to grip the end of a side-piece of a pair of spectacles. On the other side, the coupling system bears a double hinge knuckle 12 which can receive a tenon 13 forming a pivot, which penetrates a through orifice 5 provided on the side of the front face 2 of the spectacles and is retained by its anchoring head 17. The central portion 18 of the coupling system, between the claw and the double knuckle, is of lesser thickness, and is thus elastic and deformable.

Abstract: A pair of sports eyeglasses having a substantially hard, rigid frame, a pair of soft, resilient strap connector pads, and a headband assembly coupled to the rigid frame by the soft resilient strap connector pads. The soft connector pads provide cushioning at the junction between the rigid frame and the straps to provide a comfortable fit to the user. The frame front is shortened at its ends for use with helmets used in sporting activities or the like. The headband assembly includes a first elastic strap extending between the soft, resilient connector pads, a second strap coupled at its ends to the first strap and extending over the top of the user's head, and a third strap extending between the first and second straps along a rear portion of the wearer's head.

Abstract: The present invention relates to a new kind of joint, in particular for securing side pieces of spectacles to the frame of spectacles, which is capable of conferring to the bows an appropriate elasticity, both when they are braced over the temples and when they are opened or closed, so that they are not limited by any problems of size. The characteristic feature of the joint is that it has a forked part or forked spring (11 or 111), the ends (112, 114) of which have inner surfaces provided with teeth (122, 123, 124, 125) or grooves (16, 17) with slanting walls shaped so that they stand at right angles to each other and are concentrically arranged around a transverse joint pin (19, 119) linked to a second part inserted between both fork ends (112, 114). Said part is fixed to the frame (18, 118) of the spectacles and allows both parts to rotate, pressing apart the ends (12, 14 or 112, 114) of the fork, achieving the desired elasticity when the parts are rotated.

Abstract: A spectacle frame includes two side extensions each having a channel for rotatably receiving two rotary members. A pair of legs are secured to the outer rotary members. A resilient ring is engaged around the rotary members so as to couple the rotary members together. The extensions each includes a curved slot for receiving a rod of an outer rotary member. When the rod is moved along the curved slot against the ring, the ring may relatively bias the outer rotary member and the legs backward to working position so as to form a resilient coupling.

Abstract: A spectacle frame includes two extensions extended from the side portions and each having a pivot shaft and a channel. A pair of legs each has one end engaged through the channels and secured to the pivot shaft so as to allow the legs to be rotated about the pivot shafts. The legs each has a slide slidably engaged on the end end and each has a spring for biasing the slides to engage with the extensions. The springs may be easily engaged on the legs. No holes or cavities are required to be formed in the legs such that the strength of the legs will not be decreased.

Abstract: Sunglasses (20) having side shields (28) for blocking the sun at their lateral edges, include lenses (22) joined by a frame or bridge (21), temples (24) hingedly joined to the frame, the side shields (28) being slidably mounted on the temples (24) adjacent the hinges (25). The side shields have spaced ribs (29) on their inner surface (51) defining a channel (30) for receiving a temple bar, with inwardly projecting lips (31) on the ribs for engaging and releasing the temple. The side shields can slide forward and off the temples when the temples are folded, and are securely held on the temples when the temples are open and in use.

Abstract: A hinge structure of a spectacle frame has bearings formed at the ends of end pieces provided outside a pair of lenses or outside the rims supporting the lenses, pivotally rotatable shafts at the tips of a pair of temples are pivotally rotatably connected with the bearings, a compressed elastic means, being provided around the pivotally rotatable shaft exposed in the recess between the flange and the support face, to give pressure to the bearing for keeping the sliding face of the temple in slidable contact with the sliding face of the bearing. The hinge structure of a spectacle frame overcomes the disadvantages of the conventional hinge structure; that is functionally excellent because of easy assembling, needlessness of complicated adjustment, and capability to keep the temple turning torque constant for a long time; and that is also excellent in appearance and design.

Abstract: A spectacle frame includes two extensions extended from the side portions. A pulley and a cam are rotatably supported on each of the extensions. A pair of legs are secured to the cams as to be rotated in concert with the cams. The pulley and the cam each includes a peripheral slot for engaging with a ring which couples the pulley and the cam together. The extensions each includes a stop and a curved slot. The cam includes a rod slidably engaged in the curved slot. The rod may be moved against the ring such that the ring may apply a resilient force against the leg.

Abstract: A method for mounting safety shields onto eyeglass temples and a kit for carrying out that method. A temple of an eyeglass frame is placed in a channel forming part of a side shield thereafter, a pin is inserted into an opening formed in the side shield to create a friction fit between the temple, the channel and the pin which attaches the side shield to the temple. The side shield is placed in its operative position before the pin is inserted into the opening and the friction fit resulting from the insertion of the pin into the opening holds the side shield in its operative position. The kit includes a side shield having a longitudinally extending channel into which a longitudinally extending eyeglass temple may be inserted. The channel has an open lateral end through which the temple may be inserted and a supporting lateral end against which the temple may be supported. The side shield further includes an opening extending transversely to both the longitudinal direction and the supporting lateral wall.

Abstract: A method for mounting safety shields onto eyeglass temples and a kit for carrying out that method. A temple of an eyeglass frame is placed in a channel forming part of a side shield thereafter, a pin is inserted into an opening formed in the side shield to create a force fit between the temple, the channel and the pin which attaches the side shield to the temple. The side shield is placed in its operative position before the pin is inserted into the opening and the force fit resulting from the insertion of the pin into the opening holds the side shield in its operative position. The kit includes a side shield having a longitudinally extending channel into which a longitudinally extending eyeglass temple may be inserted. The channel has an open lateral end through which the temple may be inserted and a supporting lateral end against which the temple may be supported. The side shield further includes an opening extending transversely to both the longitudinal direction and the supporting lateral wall.

Abstract: An eyeglass frame, preferably for sunglasses, includes an elongate chamber for containing a fluid sunscreen. At one end the chamber includes a dispensing port and a closure plug. A mechanism is provided for dispensing a fluid sunscreen from the dispensing port, which mechanism can be a displaceable piston or a provision of a flexible container that can be squeezed by a user. This enables a user to have access to a supply of sunscreen, without having to carry a separate bottle or container of sunscreen.

Abstract: The present application describes protective eyewear having a unitary brow bar with temples and flexible molded hinges. The temples may be adjusted in length. The frame includes integrally molded flexible hinges which allow the temples to collapse. A unitary spherical lens is selectively attached to the frame and can be adapted to wrap around the forehead of the wearer's temples and include a nose bridge for supporting the lens on the wearer's nose. A stabilizing strip may be used to hold the frame and lens in place when the eyewear is assembled.

Abstract: Eyeglasses with lenses replaceable comprising a lens frame and a plurality of pairs of lenses to be selectably used and fitted in two lens holes of the lens frame by a user with easiness without need of any tools, each lens hole and each lens having the same shape, each lens hole having a circumferential wedge-shaped ridge to engage exactly with a circumferential wedge-shaped groove of each lens, each lens hole and each lens having a wedge-shape position portion and a nearly-round fitting portion to correspond with each other so that each lens may fit in each lens hole with firm stability.

Abstract: Disclosed is an eyeglasses frame using temple joints improved according to the present invention. Each hinge assembly is fixed to the joint piece of either side of the frame. It comprises an engagement piece having an axle transversing in its recess end, and a hollow sheath having a lever pivotally fixed to its open end and a spring-biased slider contained therein. The slider has a hook end. The engagement piece is fixed to the joint piece, and the sheath is fixed to the temple. The temple is connected to the front by inserting the hook of the slider in the recess of the engagement piece, and then the temple is pulled to the engagement piece by the resilient force, which is applied to the slider all the time. Thus, the temple-to-front connection is assured to be tight, still permitting the stable opening-and-folding of the temple relative to the front.

Abstract: An elastic hinge for a pair of spectacles is made, on the one hand, of a front-hinge element (10) securely fixed to a side lug (6) of the front part; and, on the other hand, of a side-hinge element (20) connected by elastic biasing means (12, 30, 40, 44) at the end of the side arm (8). The outer edge of the end (9) of the side arm (8) bears against a fixed heel (7) extending from the lug (6) or integral with the front-hinge element. This heel (7) extends beyond the axis (15) of the hinge by a distance (d) greater than 0.3 millimeters. Moreover, the side-hinge element (20) has, in its face directed towards the side arm, a recessed edge (32) which after rotation through a desired maximum angle (.theta.), comes to bear against the abutment-forming inside angled edge (5) of the heel (7).

Abstract: A foldable elastic temple for spectacles having a front half temple elastically combined with a lens frame by means of an elastic assembly consisting of a connector, a socket, a spring and a bolt, the elastic assembly fitted in a front chamber provided in a front end portion of the front temple to provide the front half temple with elasticity to be stretched outward for wearing on any size of a face, and a rear half temple combined pivotally with the front half temple to allow the front half temple folded on the rear half temple for minimizing the length of the temple in putting away.

Abstract: Adjustable size protective eyewear in the form of visitor safety spectacles have a moveable or adjustable hinge pin coupling between the temple sidebars and the lens frame. An opening in each side of the lens frame contains multiple hinge pin sockets which are aligned at an angle with respect to the lens frame such that movement of the hinge pins from socket to socket not only increases the distance between temple sidebars but also the effective length from the lens frame to the ear piece of the temple sidebar. This arrangement allows a single pair of adjustable safety spectacles to be used by a person of a given head size with the adjustability to fit over the user's prescription eyewear where the user requires the prescription eyewear in addition to the safety spectacles.

Abstract: An eyewear hinge system comprising a front frame with a generally "T" shaped member extending sidewardly on opposite ends thereof and two temple members having means for frictionally gripping and holding the "T" member.

Abstract: A type of eyeglasses designed to facilitate carrying, principally consisting of a frame, a set of elastic pieces, a set of temples, a set of springs, a pressing piece, a pawling piece, a positioning unit, a clip and several screw bolts. The eyeglasses assembled can be attached onto a belt by means of the clip on the bridge of the frame to facilitate carrying and prevent mishaps, such as misplacing and dropping the eyeglasses, from occurring. The elastic pieces, which are shaped like an accordion, and the set of temples are designed to be elastic, so that the pair of eyeglasses can be bound securely onto the belt, not affected by the waistline of the user.

Abstract: Disclosed is a connector for use in connecting a lens to an earstem, comprising a main body which contains a hinge end and a lens receiving end. The connector contains a channel for receiving a portion of the lens. The pivot end of the channel contains a recess whereas the locking end of the channel contains a projection. The hinge end of the connector is attached to the earstem by a releasable pin connection. The lens is connected to the connector by inserting a lens into the channel where the lens is pivoted at the pivot end and then the connector is snapped down to cover over the top edge of the lens. Variations, component parts, and a wire frame dual lens detachable component system are also disclosed.

Abstract: A multi-combination sunglasses assembly having a one-piece sunglasses lens, an elongated lens support frame, left and right temple members, and hinge members for detachably securing the temple members to the respective left and right ends of the lens support frame. The temple members are designed so that they can be adjusted for different sized heads while maintaining the ability to positively secure them to the wearer's head. One version has flexible temple members that have hook and loop fastening material secured to their ends so that they may be wrapped entirely around the wearer's head. A second version has adjustable temple members having a bendable ear engaging portion. The nose-pad assembly has structure that allows the sunglasses to be adjusted vertically to suit different shaped faces.

Abstract: Eyeglass hinge system and bolt therefore for connecting the bow to the frame, wherein a hinge element is provided having a threaded bore in which the thread is either metric or U.S. standard and wherein the diameter, pitch diameter, and pitch dimensions of the bolt are intermediate in size to the corresponding dimensions of the metric and U.S. standard threads in the bore.

Abstract: In glasses, in particular industrial safety or sports glasses with an integral continuous sight piece and with inclination-adjustable side pieces articulated on a frame piece it is provided for the purpose of defined and reliable inclination-adjustment accompanied by the advantage of low-cost manufacturing that the sight piece has lateral backwards oriented appendixes formed in one piece with it and extending about in parallel to the wearer's head, that a frame piece with lateral appendixes is arranged along the upper edge of the sight piece surrounding the latter and the latter's appendixes, that the frame piece with the articulated side pieces is supported on the sight piece pivotably around a horizontal pivot axis, in that pins are arranged on the inside of each of the appendixes, that the pins engage with semicircular slits concentric of the pivot axis in the appendixes of the sight piece, wherein, to arrest the pins in certain angular positions of the slits, the latter are formed by a plurality of approx

Abstract: A hinge connecting a bow (1) to a rim-side bow carrier (3) of a spectacle frame comprises is formed on said bow carrier (3) with an abutment surface, which faces the bow (1), which is formed with a pocket (7) that is open on the inside surface of the bow. The hinge bracket 5 is provided with stub pins, which constitute a pivot and are pivoted in bearing sockets (8) formed in the pocket (7). Grooves (9) extend from the bearing sockets, (8) to the inside surface of the bow and are tapered toward said bearing sockets (8) in depth or width so that the stub pins are a snap-action fit in the bearing sockets. To prevent an unintended separation of the bow from the bow carrier, the grooves extend from the bearing sockets on that side thereof which is opposite to a terminal edge (10), with which the bow engages the abutment surface (4) of the bow carrier (3) to define an open position for the bow.

Abstract: Sunglasses for infants and small children are formed of a lens-defining member made of a thin flexible light-transmitting plastic material of a sun-protective composition or color. The lens-defining member has opposite projecting tabs to which flexible extendable strips are attached for supporting the sunglasses on the head of the wearer. A frame made of a soft flexible plastic foam material and having two superimposed frame members of substantially the same shape is formed by affixing each frame member to a respective face of the lens member.

Abstract: A spectacle frame includes a nose bar, a pair of eyewires each having one side connected to the ends of the nose bar and end pieces on their other side and a pair of temples pivotally connected to the end pieces of the eyewires. The nose bar and/or the pair of temples include at least three links having interengaged end portions. These links are fixedly connected, although some limited articulation may be provided. The spectacle frame desirably includes a unique hinge assembly for the temples and may also include inserts bonded to the eyewires to permit mechanical engagement with the nose bar. The spectacle frame may also include a brow bar which is threadably captured in bosses on the eyewires.

Abstract: A hinge arranged for a spectacle includes a readily replaceable hinge rod directed through the hinge assembly, including a resilient cap securable to an uppermost flange receiving the cap. A modification of the invention includes the cap arranged for accommodation of a tether cord thereto. A further modification of the invention includes a self-lubricating and indicator hinge assembly mounted to the spectacle structure.

Abstract: A hinge for an eyeglass frame which hinge is of two piece construction, one half attached to a temple and the other to the lens frame, with a captive screw in one hinge half which engages a portion of the other hinge half to retain the hinge together.

Abstract: An apparatus configured as an eyeglass assembly rotatably mounting a tissue roll to the eyeglass assembly in a spaced relationship as a comment on an individual's character and/or irreverent comments.

Abstract: An integrated field eyewear system of modular construction to permit adaptation to a wide range of wearers and operating conditions. A bridge includes a brow bar formed with slots for alternatively receiving left and right plano lenses or lens frames formed with openings for receiving snap-in corrective lenses. The plano lenses and lens frames are in turn formed with sockets for alternatively receiving either temples or anchors for receiving a headband. Sunshade or laser-protective secondary lenses may be snapped into place over the primary lenses to afford necessary protection. The front consisting of the bridge and the selected viewing elements may be fitted together with a removable goggle frame between the front and the wearer's face. To facilitate their use with lens frames of fixed dimensions, the corrective lenses are formed with bevels conforming to the surface of a sphere of constant radius, even for lenses of different front curvatures.

Abstract: The present invention relates to an eyeglass frame which uses parts made of an NT alloy. The eyeglass frame according to the present invention comprises a bridge (9) formed of a material which is difficult to work and a pair of right and left rims (2) which are formed integrally with opposite ends of said bridge (9). With this arrangement, easy production processes can be achieved and the number of parts can be reduced, whereby it is possible to mass-produce eyeglass frames.

Abstract: A glasses frame is provided including a pair of opposite end temples pivotally supported therefrom for swinging movement between use positions extending rearwardly of the frame and folded positions swung inwardly into position generally paralleling and disposed rearwardly of the rear side of the frame. Rigid adjustable abutment structure is operably connected between each temple and the corresponding frame end spaced along the temple from its pivot axis of swinging movement toward the free end of the temple for positively adjustably limiting swinging movement of the temple to the use position thereof, the temples being constructed of stiff, but flexibly resilient material. The use of positive adjustable limit stops in conjunction with stiff, but flexibly resilient and bendable temples enables equal side pressure to be exerted upon the opposite sides of the head of the user by the temples while still enabling the frame to be square with the face of the user.

Abstract: A compression joint for assembly at the junction of an eyeglass temple and the adjacent lens frame. The joint has a resiliently compressible portion that is placed under compression when a temple is in fully open position. This permits the temple to swing beyond a normal open position and to be biassed toward a partially open position, thereby providing snug fitting glasses regardless of head size and/or wear during use.