WO2013030565A1

WO2013030565A1 - Spectacles

Info

Publication number: WO2013030565A1
Application number: PCT/GB2012/052112
Authority: WO
Inventors: John SNELGROVE
Original assignee: Snelgrove John
Priority date: 2011-08-30
Filing date: 2012-08-29
Publication date: 2013-03-07
Also published as: GB2494130A; GB201114882D0

Abstract

This invention relates to fitting a lens to a pair of spectacles. The invention includes a modular assembly, including a frame-engaging member, for at least partially frictionally engaging a frame, a clasping member, for engaging the frame-engaging member such that either the frame-engaging member or the clasping member frictionally engages the frame, wherein a lens is attachable to the clasping member. This invention also relates to a strip, having a first side having a groove configured to receive a lens having a V-shape periphery, and a second side having a protrusion configured to engage a lens having a groove.

Description

SPECTACLES

This invention relates to a pair of spectacles. More specifically, this invention relates to apparatus for fitting a lens to a pair of spectacles.

The spectacles in the prior art require professional manufacturing with specialist equipment. The manufacturing processes of the prior art ensure the spectacles are manufactured specifically to a person's eyeglass prescription. To ensure longevity, the spectacles are manufactured such that it is difficult or impossible to alter their original fit, without using the specialist equipment. The spectacles in the prior art are therefore limited to a single person, or at least to people with a particular eyeglass prescription. The manufacturing processes are also expensive, as they require specialist equipment.

In developing countries, many people cannot work due to vision defects and poor access to eye care professionals. Despite charitable drives to donate spectacles to the developing world, the spectacles may only be donated to a person with the same eyeglass prescription. Furthermore, remanufacturing the spectacles in the developing country to create spectacles with the correct eyeglass prescription is not possible without the specialist equipment. It is therefore desirable to provide spectacles that alleviate some or all of the above problems. In particular, it is desirable to provide spectacles that may be manufactured without specialist equipment.

According to a first aspect of the invention, there is provided spectacles comprising a frame, configured to extend across the front of a user's head; a lens; a first and second c-shaped member, each having an internal portion for at least partially frictionally engaging the frame, and each having an external portion; a first and second clasping member, configured to engage the first and second c-shaped member respectively, such that either the clasping member or the c-shaped member frictionally engages the frame, wherein the lens is attachable to both the first and second clasping member.

The present invention therefore provides an easy-to-use modular system for fitting a lens to a pair of spectacles, without the need for specialist equipment. The spectacles may be simply assembled by placing the frame-engaging member on the frame, and moved along the frame such that when aligned with a first bore on a first lens, the first lens aligns with the user's pupilliary distance. The frame-engaging member at least partially frictionally engages the frame such that it may be moved along the frame, but is held in position when not experiencing a substantial external force. With the frame-engaging member in position, the clasping member may then engage the frame-engaging member, such that the frame-engaging member or the clasping member frictionally engages the frame. Therefore, the frame-engaging member and the clasping member may not move out of position when experiencing a substantial external force. The lens is attachable to the clasping member, such that the lens may also be securely held in position on the frame.

This modular system therefore alleviates the need for specialist equipment to fit lenses to spectacles, thus helping people in developing countries gain access to prescription eyewear. Preferably, the clasping member is configured to engage the external portion of the frame- engaging member, increasing the frictional engagement between the frame-engaging member and the frame. This provides a simple mechanism for engaging the clasping member and frame-engaging member such that they frictionally engage the frame.

Alternatively, the frame-engaging member includes a bore, and the clasping member includes a screw, such that the screw passes through the bore of the frame-engaging member and frictionally engages the frame; or the clasping member may include a bored member, for engaging the frame-engaging member, and a screw, such that the screw passes through the bored member and frictionally engages the frame.

Preferably, the spectacles further comprise a pad arm, wherein the pad arm is also attachable to the clasping member. According to a second aspect of the invention, there is provided apparatus, for fitting a lens to a frame on a pair of spectacles, comprising a flexible strip including a first side having a groove, for receiving a lens having a V-shaped periphery, and a second side having a protrusion, for engaging a lens having a groove. The second aspect of the invention provides a useful strip that may be used to fit two lenses having two different fitting arrangements (such as a first lens having a V-shaped periphery and a second lens having a groove for a cord) to a pair of spectacles. In developing countries, the chances of someone finding not only a lens with the correct prescription, but also the correct fitting type, are small. However, using the apparatus of the second aspect of the invention, the person may use one side of a first strip to fit a lens having a first fitting type, and a second side of a second strip to fit a lens having a second fitting type. Therefore, the chances of finding lenses suitable lenses dramatically increase.

Preferably, the strip has a first and second end, each having a bore for receiving a screw.

Embodiments of the invention will now be described, by way of example, and with reference to the drawings in which:

Figure 1 is a perspective view of a first embodiment of a pair of spectacles of a first aspect of the present invention;

Figure 2 is an exploded perspective view of the spectacles of Figure 1 ;

Figure 3 is an exploded front perspective view of a first c-shaped member and a first clasping member of the spectacles of Figure 1 ;

Figure 4 is an exploded rear perspective view of the first c-shaped member and the first clasping member of Figure 3;

Figure 5 is an exploded perspective view of a second embodiment of a pair of spectacles of a first aspect of the present invention;

Figure 6 is an exploded perspective view of a third embodiment of a pair of spectacles of a first aspect of the present invention;

Figure 7 is an exploded perspective view of a fourth embodiment of a pair of spectacles of a first aspect of the present invention;

Figure 8 is an exploded perspective view of a fifth embodiment of a pair of spectacles of a first aspect of the present invention; Figure 9 is an exploded perspective view of an alternative embodiment of a pair of spectacles of the present invention, showing a modular assembly attaching both a lens and a pad arm to a frame on the spectacles;

Figure 10 is a side view of a preferred embodiment of a strip of a second aspect of the present invention;

Figure 1 1 is a perspective view of the strip of Figure 10; and

Figure 12 is an end view of the strip of Figure 1 1 .

A first embodiment of a pair of spectacles 100 of a first aspect of the present invention will now be described with reference to Figures 1 to 4. The spectacles 100 include a frame 1 10, configured to extend across the a front of a user's head, a first lens 1 12, including a first and second bore 1 13, 1 14, a second lens 1 15, including a first and second bore 1 16,1 17, and a plurality of modular assemblies for attaching the first and second lens 1 12, 1 15 to the frame 1 10.

The first modular assembly for attaching the first lens 1 12 to the frame 1 10 will now be described. The first modular assembly includes a first c-shaped member 121 , a first clasping member 122, including a first spacer 122sp and a first screw 122sc. The first c- shaped member 121 and the first clasping member are shown more clearly in Figures 3 and 4. The first c-shaped member 121 has an internal section 121 i and an external section 121 e. The internal section 121 i of the first c-shaped member 121 is shaped and dimensioned to at least partially frictionally engage the frame 1 10. The magnitude of the frictional engagement between the first c-shaped member 121 and the frame 1 10 is such that the first c-shaped member 121 may not fall off the frame 1 10 under its own weight, but may easily slide along the frame 1 10. Thus, the first c-shaped member 121 is in slidable frictional engagement with the frame 1 10.

The first c-shaped member 121 is set to a position on the frame 1 10, such that when the first bore 1 13 of first lens 1 12 is aligned with the first c-shaped member 121 , the first lens 1 12 is aligned with a user's pupilliary distance.

The first clasping member 122 has a first portion 122.1 and second portion 122.2. The first and second portion 122.1 , 122.2 each have a bore 122.1 b, 122.2b, extending centrally therethrough. The first portion's bore 122.1 b is wider than the second portion's bore 122.2b, and is shaped and dimensioned to engage the external section 121 e of the first c-shaped member 121 . The second portion's bore 122.2b is shaped and dimensioned to receive the screw 122sc. The external section 121 e of the first c-shaped member 121 has a thread, and the first portion's bore 122.1 b has a corresponding thread. Thus, the first clasping member 122 may be screwed on to the first c-shaped member 121 . The shape and dimensions of the frame 1 10, first c-shaped member 121 and first clasping member 122 are such that as the first clasping member 122 is screwed on to the first c-shaped member 121 , the magnitude of the frictional engagement between the first c-shaped member 121 and the frame 1 10 increases. In this embodiment, the magnitude of the frictional engagement increases such that it requires a substantial force from the user to move the first modular assembly away from its position on the frame 1 10. The second portion 122.2 of the first clasping member 122 has a 15-point star-shaped profile. As shown in Figure 1 , in this embodiment, the second portion 122.2 of the first clasping member 122 receives the first spacer 122sp. The screw 122sc is configured to pass through the first bore 1 13 in the first lens 1 12, and screw into the first clasping member's 122 second portion's bore 122.2b. The second portion's bore 122.2b has a complimentary threading to the screw 122sc, such that the screw 122sc is attached thereto. The first lens 1 12 is therefore sandwiched between the first spacer 122sp and the screw 122sc.

Therefore, the first lens 1 12 is attached to the first clasping member 122, which is engaged with the first c-shaped member 121 , which is frictionally engaged with the frame 1 10. The first lens 1 12 is thus securely attached to the frame 1 10. The second modular assembly is then used to further attach the first lens 1 12 to the frame 1 10 in the following manner. A second c-shaped member 131 is placed on the frame 1 10 near the second bore 1 14 in the first lens 1 12, and a second clasping member 132 is screwed onto the second c-shaped member 131 to frictionally engage the second c-shaped member 131 and second clasping member 132 to the frame 1 10. A second screw 132sc is configured to pass through the second bore 1 14 in the first lens 1 12 and a second spacer 132sp, and screw into a second portion 132.2 of the second clasping member 132, thus also attaching the first lens 1 12 to the frame 1 10.

The spectacles 100 also include a first pad arm 145, which includes an internal 15-point star- shaped profile. The spectacles 100 also include a third modular assembly for attaching the first pad arm 145 to the frame 1 10, including a third c-shaped member 141 , and a third clasping member 142, including a third washer 142w and a third screw 142sc.

The third clasping member includes a first portion 142.1 and a second portion 142.2 each having a bore 142.1 b, 142.2b extending centrally therethrough. The first portion's bore 142.1 b is configured to engage an external section of the third c-shaped member 141 , and the second portion's bore 142.2b is configured to receive the screw 142sc. In the third modular assembly, the second portion 142.2 has an external star-shaped profile, for receiving the first pad arm 145.

The first pad arm 145 is attached to the frame 1 10 in the following manner. The third c- shaped member 141 is placed onto the frame 1 10 for partial frictional engagement therewith. The third clasping member 142 is screwed onto the third c-shaped member 141 such that they are frictionally engaged with the frame 1 10. The first pad arm 145 is placed onto the second portion 142.2 of the third clasping member 142. The position of the third c-shaped member 141 on the frame 1 10 and the angle between the first pad arm 145 and the frame 1 10 are such that the first pad arm 145 extends to the user's nose.

The third screw 142sc is then inserted through the third washer 142w and is screwed into the second portion's bore 142.2b, such that the first pad arm 145 is sandwiched between the third washer 142w and the third clasping member 142 and attached thereto. The first pad arm 145 is therefore attached to the frame 1 10 by virtue of the frictional engagement between the third c-shaped member 141 and the frame 1 10. The second lens 1 15 and a second pad arm 146 are then attached to the frame 1 10 in a similar manner, using a fourth, fifth and sixth modular assembly.

A second embodiment of a pair of spectacles 200 of a first aspect of the present invention will now be described with reference to Figure 5. The spectacles 200 are substantially similar to the spectacles 100 of the first embodiment. However, instead of a distinct screw, a first clasping member 222 has a first threaded protrusion 222p, which is configured to extend through a first bore 213 in a supporting member 21 1 , holding a first lens 212. A first nut 222n, having a threading corresponding to the first threaded protrusion 222p, is screwed onto the first protrusion 222p to sandwich the first supporting member 21 1 between the first nut 222n and the first clasping member 222 (which is engaged with a first c-shaped member 221 , which is frictionally engaged with a frame 210).

A third embodiment of a pair of spectacles 300 of a first aspect of the present invention will now be described with reference to Figure 6. Again, the spectacles 300 include a frame 310, a first lens 312, and a first and second modular assembly for attaching the first lens 312 to the frame 310.

In this embodiment, the first modular assembly comprises a first c-shaped member 321 having a first bored protrusion 321 p extending therefrom, and a first clasping member. The first clasping member includes a first screw 322sc, a first reach nut 322n, a first spacer 322sp and a first washer 322w. The first bored protrusion 321 p and the first reach nut 322n both have a complimentary threading to the first screw 322sc. A second modular assembly is provided having corresponding features. The first lens 312 includes a first bore 313 having a first bore section 313a and a second bore section 313b, wherein the first bore section 313a is shaped and dimensioned to receive the first screw 322sc and the second bore section 313b is shaped and dimensioned to receive the first reach nut 322n.

The first lens 312 is attached to the frame 310 in the following manner. The first c-shaped member 321 is positioned on the frame 310, such that it partially frictionally engages thereto. The first c-shaped member 321 may slide along the frame 310 such that when aligned with the first bore 313 of the first lens 312, the first lens 312 aligns with the user's pupilliary distance. The screw 322sc is then inserted through the first spacer 322sp, the first and second bore sections 313a, 313b of the first bore 313 of the first lens 312, and then either end of the screw 322sc is inserted into the corresponding threading inside the first bored protrusion 321 p on the first c-shaped member 321 and the first reach nut 322n. The first reach nut 322n is then rotated, which tightens the screw 322sc, thus sandwiching the first lens 312 between the first reach nut 322n and the first c-shaped member 321 .

The screw 322sc also passes through the bored protrusion and frictionally engages the frame 310, thus preventing any movement of the first modular assembly away from its position on the frame 310. Therefore, the first lens 312 is attached to the frame 310.

A second c-shaped member 331 is then placed on the frame 210 such that it aligns with a second bore 314 of the first lens 312. In a similar manner to the first modular assembly, a second screw 332sc is inserted through a first and second bore section 314a, 314b of the second bore 314 of the first lens 312, and either end of the second screw 332sc is inserted into corresponding threading inside a second bored protrusion 331 p on the second c-shaped member 331 and a second reach nut 332n. The second reach nut 332n is then rotated, which tightens the second screw 332sc, sandwiching the first lens 312 between the second reach nut 332n and the second c-shaped member 331 . A first pad arm 345 is provided, which includes an internal 15-point star-shaped profile. The spectacles 300 also include a third modular assembly, for attaching the first pad arm 345 to the frame 310, including a third c-shaped member 341 and a clasping member 342. The third c-shaped member 341 has a bored protrusion 341 p having an external square-shaped profile. The third clasping member 342 includes a third screw 342sc, a third washer 342w and a third nut 342n. The third nut 342n and the bored protrusion 341 p have complimentary threading to the screw 342sc.

The third c-shaped member 341 may be placed on the frame 310 for partial frictional engagement therewith. The inner star-shaped profile of the first pad arm 345 is then placed onto the external square-shaped profile of the third c-shaped member 341 . The position of the third c-shaped member 341 on the frame 310 and the angle between the first pad arm 345 and the frame is such that the first pad arm 345 extends towards the user's nose.

The first pad arm 345 is attached to the frame 310 in the following manner. The screw 342sc is inserted through the third washer 342w and the inner star-shaped profile of the first pad arm 345. Either end of the screw 342sc is then inserted into the third nut 342n and the bored protrusion 341 p. The nut 342n is then rotated, tightening the third screw 342sc such that the first pad arm 345 is sandwiched between the third nut 342n and the third c-shaped member 341 and such that the third screw 342sc frictionally engages the frame. A second lens (not shown) and a second pad arm (not shown) may be provided, which may be secured to the frame 310 in a similar manner, using a fourth, fifth and sixth modular assembly. A fourth embodiment of a pair of spectacles 400 of a first aspect of the present invention will now be described with reference to Figures 7. Again, the spectacles 400 include a frame 410, a first lens 412 and a first and second modular assembly for attaching the first lens 412 to the frame 410. The first lens 412 includes a first and second bore 413, 414. In this embodiment, the first modular assembly comprises a first c-shaped member 421 including a bored protrusion 421 p and a first clasping member. The first clasping member comprises a first spacer 422sp, a first screw 422sc and a first reach nut 422n. The bored protrusion 421 p and the first reach nut 422n are shaped and dimensioned to receive the screw 422sc and have a complimentary threading.

The first lens 412 may be attached to the frame 410 in the following manner. The first c- shaped member 421 is placed on the frame 410, such that it is partially frictionally engaged thereto. Therefore, the first c-shaped member may slide along the frame 410 and remain in position 410 thereafter. The first screw 422sc is inserted through the first bore 413 and the first spacer 422sp, and a first and second end of the first screw 422sc are inserted into the bored protrusion 421 p and the first reach nut 422n respectively.

The first reach nut 422n is then rotated such that it tightens the first screw 422sc, causing the first lens 412 to become sandwiched between the first reach nut 422n and the spacer 422sp. The first screw 422sc passes through the bored protrusion 421 p until it abuts the frame 410, thus frictionally engaging the frame 410 and preventing and movement of the modular assembly (and thus the lens 412) away from its position.

The second modular assembly comprises the same features as the first modular assembly, and is configured to attach the first lens 412 to the frame 410 via the second bore 414. The second modular assembly includes a second c-shaped member 431 including a second bored protrusion 431 p, and a second clasping member. The second clasping member includes a second spacer 432sp, a second screw 432sc, and a second reach nut 432n. In a similar manner to the first modular assembly, the first lens 412 is attached to the frame 410 via the second modular assembly through the second bore 414.

In this embodiment, a first pad arm 445 is provided, which includes an internal 15-point star- shaped profile. The spectacles 400 also include a third modular assembly, for attaching the first pad arm 445 to the frame 410, including a third c-shaped member 441 including a third bored protrusion 441 p having an external square profile, which is placed onto the frame 410 for partial frictional engagement therewith. The star-shaped profile of the first pad arm 445 is positioned onto the square profile of the third bored protrusion 441 p. The position of the third c-shaped member 441 and the angle of the first pad arm 445 is set such that the pad arm extends towards the user's nose.

The third modular assembly 400 also includes a third clasping member 442, including a third screw 442sc and a third nut 444n. The third bored protrusion 441 p and the third nut 444n have complimentary threading to the screw 442sc. Therefore, the pad arm may be attached to the frame 410 by passing the third screw 442sc through the star-shaped profile of the first pad arm 445, inserting either end of the screw 442sc into the third bored protrusion 441 p and the third nut 442n, and tightening the third nut 442n such that the first pad arm 445 is sandwiched between the third nut 442n and the third c-shaped member 441 .

A second lens (not shown) and a second pad arm (not shown) may be attached to the frame 410 in a similar manner, using a fourth, fifth and sixth modular assembly.

A fifth embodiment of a pair of spectacles 500 of a first aspect of the present invention will now be described with reference to Figure 8. The spectacles 500 include a frame 510, a first lens 512 including a first and second bore 513, 514 and a first and second modular assembly for attaching the first lens 512 to the frame 510.

The first modular assembly includes a first c-shaped member 521 and a first clasping member. The first clasping member includes a first bored member 522b, a first screw 522sc, a first spacer 522sp, a first washer 522w, and a first reach nut 522n. The first bored member 522b is configured for slidable engagement with the first c-shaped member 521 .

The first modular assembly attaches the first lens 512 to the frame 510 in the following manner. The first c-shaped member 521 is placed onto the frame 510 such that it is in partial frictional engagement therewith. The first c-shaped member 521 may therefore slide along the frame 510 when forced but otherwise will remain in position. The first c-shaped member 521 has a groove 521 g, which is configured to receive a corresponding protrusion 522p on the first bored member 522b. Thus the bored member 522b may engage the first c- shaped member 521 . The first screw 522sc is inserted through the first bore 513 in the first lens 512, the first spacer 522sp, and the first washer 522w. Either end of the first screw 522sc is then inserted into the first bored member 522b and the first reach nut 522n. The first reach nut 522n is then tightened until the first lens 512 is sandwiched between the first spacer 522sp and the first washer 522w, and the first screw 522sc abuts the frame 510. Thus, the first modular assembly (and therefore the first lens 512) frictionally engages the frame 510.

The second modular assembly includes the same features as the first modular assembly, and is configured to attach the first lens 512 to the frame 510 in the same manner via the second bore 514.

In this embodiment, a first pad arm 545 is also provided, which includes an internal 15-point star-shaped profile. The spectacles 500 also include a third modular assembly, for attaching the first pad arm 545 to the frame 510, including a third c-shaped member 541 , a third bored member 542 for slidable engagement with the third c-shaped member 541 , and a third clasping member including a third screw 543, a pair of third washers 543w and a third nut 543n. The third bored member 542b and the third nut 543n have a complimentary threading to the third screw 543sc. The first pad arm 545 is attached to the frame 510 in the following manner. The third c- shaped member 541 is placed onto the frame 510 for partial frictional engagement therewith. A third protrusion 542p in the third bored member 542b is inserted into a third groove 531 g in the third c-shaped member 531 . The internal star-shaped profile of the first pad arm 545 is then placed onto an external square profile of the third bored member 542b. The position of the c-shaped member 541 on the frame 510 and the angle between the first pad arm 545 and the frame 510 is such that the first pad arm 545 extends towards the user's nose.

The third screw 542sc is then inserted through the internal star-shaped profile of the first pad arm 545 and the pair of washers 542w, and either end of the screw 542sc is inserted into the third bored member 542b and the third nut 542n. The third nut 542n is then tightened to sandwich the first pad arm 545 between the third c-shaped member 541 and the third nut 542n. The screw 542sc abuts and frictionally engages the frame 510, thus attaching the first pad arm 545 to the frame 510.

A second lens (not shown) and a second pad arm (not shown) may be attached to the frame 510 in a similar manner, using a fourth, fifth and sixth modular assembly.

The skilled person will understand that the first and second lens of any embodiment of the present invention may be replaced with a lens of any shape, and may also include a supporting member having a first and second bore, e.g. a lens frame (Figure 5) or a supra- frame including a first and second bore, for receiving a first and second screw or protrusion. Furthermore, it is not essential that the spectacles have two lenses, as a first lens may be provided and a second transparent, non-prescription member may replace the second lens.

Furthermore, the skilled person will understand that it is not essential for the first and second pad arms to be attached to the frame using a separate modular assembly. For example, the first pad arm may be placed on the square or star-shaped profile of the bored member, the bored protrusion, or the second portion of the clasping member (e.g. as shown in Figure 9). Thus, being attached to the frame together with the lens by the modular assembly. In some circumstances (e.g. where the user's eye-to-nose distance is particularly large), a separate modular assembly should be used as detailed in the embodiments above.

The skilled person will also understand that, in the first embodiment, the screw may also frictionally engage the frame. Thus increasing the overall frictional engagement of the modular assembly with the frame.

The skilled person will also understand that the shape of the c-shaped members is not essential. That is, the member needs to at least partially frictionally engage the frame (such that it may slide along the frame but not fall off under its own weight). In most circumstances, this will result in a c-shape internal profile such that is may engage common frame shapes. However, it is not essential that it is this specific shape, but rather the internal profile of the member should be such that it may engage a frame. It is also not essential for the star-shaped profiles of the clasping members to have 15 points. Rather, any star-shaped profile may be used.

A preferred embodiment of a strap 600 of a second aspect of the present invention will now be described with reference to Figures 10 to 12. The strap 600 is constructed from a flexible material, such as a flexible plastic. The strap's 600 length is such that it may extend from a first upper corner region of a lens (i.e. from a first point on the lens' circumference where it abuts the frame) to a second upper corner region of the lens (i.e. to a second point on the lens' circumference where it abuts the frame). The strap 600 includes a first and second lateral bore 602, 604 extending through the strap 600 at a first and second end thereof respectively. The strap 600 has a first side 610, having a protrusion 612 extending therefrom. In this embodiment, the protrusion is 0.6mm wide (corresponding to the width of the groove in a Supra frame (i.e. half frame) lens). As shown more clearly in Figure 12, the second, opposing, side 620, of the strap 600 includes a groove 622. The groove 622 is configured to receive a lens having a V-shape periphery.

Referring back to Figure 10, the protrusion 612 also includes a first and second bore 614, 615, running from a first and second end of the protrusion 612 (corresponding to the first and second end of the strap 600), through the strap 600 to the second side 620. The first and second bore 602, 604 are for receiving a nylon cord.

The strap 600 may therefore be used to fit both a Supra frame (half frame) lens or a V- shaped lens to a pair of spectacles. For example, a pair of spectacles is provided with a first lens, having a V-shaped periphery, and a second lens, having a groove for a nylon cord. The first lens, having the V-shaped periphery, may then be fitted to the pair of spectacles by abutting a second side 620 of a first strap 600 against the periphery of the first lens. The first strap 600 runs around the circumference of the second lens such that the first and second lateral bore 602, 604 are adjacent the spectacle's frame. Thus, the first lens may be attached to the frame via the first and second lateral bore 602, 604 (in either a traditional manner, or in a similar manner to the first aspect of the invention).

Then, for the second lens having a groove for a nylon cord, a second strap 600 may be aligned such that the protrusion 612 on the first side of the strap 600 is inserted into the groove on the second lens. The second strap 600 runs around the circumference of the second lens such that the first and second lateral bore 602, 604 are adjacent the spectacle's frame. Thus, the second lens may be attached to the frame via the first and second lateral bore 602, 604 (in either a traditional manner, or in a similar manner to the first aspect of the invention).

The skilled reader will understand that any combination of features is possible, without departing from the scope of the invention, as claimed.

Claims

Spectacles comprising

a frame, configured to extend across the front of a user's head;

a lens;

a first and second c-shaped member, each having an internal portion for at least partially frictionally engaging the frame, and each having an external portion; a first and second clasping member, configured to engage the first and second c-shaped member respectively, such that either the clasping member or the c-shaped member frictionally engages the frame,

wherein the lens is attachable to both the first and second clasping member.

Spectacles as claimed in Claim 1 , wherein the first and second clasping members are configured to engage the external portions of the first and second c-shaped members respectively, increasing the frictional engagement between the c-shaped members and the frame.

Spectacles as claimed in Claim 1 , wherein the first and second c-shaped member each include a bore, and the first and second clasping member each include a screw, such that the screws pass through the bores of the first and second c-shaped members and frictionally engage the frame.

Spectacles as claimed in Claim 1 , wherein the first and second clasping member each include a bored member, for engaging the first and second c-shaped member respectively, and a first and second screw, such that the screws pass through the bored members and frictionally engage the frame.

5. Spectacles as claimed in any preceding claim, further comprising a pad arm, wherein the pad arm is also attachable to the first or second clasping member.

6. Spectacles as herein described with reference to and as shown in any one of the accompanying drawings. 7. Apparatus, for fitting a lens to a frame on a pair of spectacles, comprising a flexible strip including a first side having a groove, for receiving a lens having a V-shaped periphery, and a second side having a protrusion, for engaging a lens having a groove. 8. Apparatus as claimed in Claim 7, wherein the strip has a first and second end, each having a bore for receiving a screw.

9. Apparatus as herein described with reference to and as shown in any one of the accompanying drawings.