Screws: freedom of selection
Rimless frames with screw or sleeve fastening give cart blanche for choosing the shape of the sample. - Do you want a perfect circle? - Here it is. - Strict authoritative image? - No problem. - Romantic butterflies or extravagant cats? - Just say what you want. You can even.draw a shape of your own. Ordering rimless frames we choose only temples, bridge, color, width, type of fastening. The sample can be any you like.
Technical issues: type of fastening, reliability and prescription.
The layout of a rimless frame depends greatly on your prescription. The lens thickness depends on the combination of the diopter, the Pupillary Distance and the size of the sample. An adviser, who takes your order, will measure the diameter and check it with the table of the width of the edge or the center of lenses.According to this, the needed refractive index can be chosen. Fortunately, screw fastenings have a bigger boom of the temple than full-rim frames. As a result, the width of the glasses light and, accordingly, the width of the lens are smaller. But one will have to choose high index lenses for big samples for keeping the original weightless image.Opticians often used to refuse to make screw frames in case of an astigmatic prescription. Modern equipment allows to screw fasten astigmatic lenses with no problem. But you should pay attention to the reliability of the frame’s position on your face, without slants and sliding.
TYPES OF LENS FASTENING.
This is a well-known and widely spread type. Plastic grommets are used for protecting a lens from extra pressure at the junctions of this lens and frame parts. Materials lose their elasticity under the influence of constant pressure and ultraviolet, and lenses get loose. The problem is not in the fact that the female screw has come unscrewed. It is natural wear and tear during use. The ptroblem is easily solved by preventive servicing or fitting polycarbonate or other high-impact lenses with no necessity in grommets. Glueing screws isn’t helpful as it doesn’t influence the plastic’s wearing process, and servicing and lens shift will become impossible. There is a specific way of fastening when the foot of the nose pad on the bridge is in the sawed channel of the lens. This is actually a one-use version because the metal in the place of soldering has to be heavily bended which excludes adequate servicing (taking pokes at technologists).
This is a transitional from female screws to sleeves version. Using standard equipment you get an aesthetically attractive version: the screws don’t stick out, the fastening is of the lowest size, but the reliability is worsened. The impacts on the lens are higher, the supreme accuracy of production is needed, the assemblage time increases greatly because of the necessity of choosing the perfect screw length. Consequently, your glasses will look beautiful, but you should know that very few technicians can do such a complicated and precise job.
Designers’ imagination is boundless. There is a big amount of unusual types of fastening: miniscrews, micro self-tappers, projection of the frame into a channel (which can be a sawed channel), laser cutting of complicated shape lenses, branded types of sleeves and plastic female screws. Absence of removable elements (spares) doesn’t allow to serve and repair such frames. On the other hand, exclusiveness is guaranteed. The only reasonable irregular way of fastening is a tied in a knot line, as the junction of the frame’s metal and the lens is correct in the highest possible way. Of course, you have to make three bores and the drilling must be very precise. But everything is producible and reliable.
We are grateful for this modern technology to Austrian introducers. The fastening is nearly invisible. Weightless charm of your image is guaranteed. This technology makes a technician strictly follow the installation directions. But the highest demands should be made on manufacturers. The slightest mistake in the geometry of fastening makes the reliable junction of the lenses and the frame impossible. That is why, it is not worth buying a fake of a brand frame on the Internet as it won’t serve long, and paid lenses as well as highly-skilled work will be lost in vain. Having visual weightlessness, sleeves are also one of the most reliable types of frames. They serve for years, but servicing is made only in a workshop with specialised equipment and with availability of consumables. Difficulties in making and serving create successfulness and exclusiveness of your image.
RELIABILITY
Functionality of a rimless frame directly depends on the rigidity of the structure. The thinner is the frame the better as the whole load lies down on the lenses in cases of mechanical deformation or during accidents. It can be difficult to imagine, but we have assembled thin titanium sleeve-fastened glasses, crushed by a car wheel wthout serious damage, several times. In any case, the equipment of any optic workshop includes spot welding which allows to reconstruct the original fastening (just don’t lose any small parts, because a reliable junction is possible only with original alloys). If the temples of your screwed frame are wide, unbending and without flexes (springs), it is a necessity to have impact-resistant lens materials and delicate handling, especially, if you have a plus refraction for reading.
Which lenses to choose?
Any brand lenses can be both screw fastened and sleeve fastened but reliability and flexibility in application can be provided only by modern strong materials. The simplest version is polycarbonate which is the strongest optic material. But it is unmanageable, has a low Abbe number and is easily damaged by various solvents. Trivex is a higher quality version. It is a bit weaker but has high optic characteristics. The latest thing is tribride. It has high optic quality and is easily workable. Unfortunately, not all diopters have affordable prices. In this case choose materials with the refraction index 1.6 or 1.67. They are stronger than 1.5 or 1.56 and available in the wide range of diopters.
Rimless glasses: transparent, tinted, sunprotective.
Whatever version you choose (showy, dynamic or trendy), high-status appearance is guaranteed. Selfconfidence, readiness to experience new things, take responsibility and solve any kind of problems… All of these is transmitted to people around you with the help of your rimless glasses image. Pay attention to news channels. Most serious presenters and politicians prefer just screw frames.If you choose a transparent version, the translucence should be of the highest quality. The less visible are the lenses the better. When fitting cosmetic slightly tinned lenses, choose a substandard sample with an irregular shape. Choose classical or conservative brands for sunprotective versions not to overelaborate your already bright image. In any case, the lightest in weight rimless glasses provide you with the highest possible comfort when constantly used.
Rimless frames have lots and lots of shapes. Use your imagination, draw, experiment, make your own exclusive brands and unimitable images.
August 2018 © Design Optic Albina - The contents of this website are protected by copyright.
This is a well-known and widely spread type. Plastic grommets are used for protecting a lens from extra pressure at the junctions of this lens and frame parts. Materials lose their elasticity under the influence of constant pressure and ultraviolet, and lenses get loose. The problem is not in the fact that the female screw has come unscrewed. It is natural wear and tear during use. The ptroblem is easily solved by preventive servicing or fitting polycarbonate or other high-impact lenses with no necessity in grommets. Glueing screws isn’t helpful as it doesn’t influence the plastic’s wearing process, and servicing and lens shift will become impossible. There is a specific way of fastening when the foot of the nose pad on the bridge is in the sawed channel of the lens. This is actually a one-use version because the metal in the place of soldering has to be heavily bended which excludes adequate servicing (taking pokes at technologists).
This is a transitional from female screws to sleeves version. Using standard equipment you get an aesthetically attractive version: the screws don’t stick out, the fastening is of the lowest size, but the reliability is worsened. The impacts on the lens are higher, the supreme accuracy of production is needed, the assemblage time increases greatly because of the necessity of choosing the perfect screw length. Consequently, your glasses will look beautiful, but you should know that very few technicians can do such a complicated and precise job.
Designers’ imagination is boundless. There is a big amount of unusual types of fastening: miniscrews, micro self-tappers, projection of the frame into a channel (which can be a sawed channel), laser cutting of complicated shape lenses, branded types of sleeves and plastic female screws. Absence of removable elements (spares) doesn’t allow to serve and repair such frames. On the other hand, exclusiveness is guaranteed. The only reasonable irregular way of fastening is a tied in a knot line, as the junction of the frame’s metal and the lens is correct in the highest possible way. Of course, you have to make three bores and the drilling must be very precise. But everything is producible and reliable.
We are grateful for this modern technology to Austrian introducers. The fastening is nearly invisible. Weightless charm of your image is guaranteed. This technology makes a technician strictly follow the installation directions. But the highest demands should be made on manufacturers. The slightest mistake in the geometry of fastening makes the reliable junction of the lenses and the frame impossible. That is why, it is not worth buying a fake of a brand frame on the Internet as it won’t serve long, and paid lenses as well as highly-skilled work will be lost in vain. Having visual weightlessness, sleeves are also one of the most reliable types of frames. They serve for years, but servicing is made only in a workshop with specialised equipment and with availability of consumables. Difficulties in making and serving create successfulness and exclusiveness of your image.
Functionality of a rimless frame directly depends on the rigidity of the structure. The thinner is the frame the better as the whole load lies down on the lenses in cases of mechanical deformation or during accidents. It can be difficult to imagine, but we have assembled thin titanium sleeve-fastened glasses, crushed by a car wheel wthout serious damage, several times. In any case, the equipment of any optic workshop includes spot welding which allows to reconstruct the original fastening (just don’t lose any small parts, because a reliable junction is possible only with original alloys). If the temples of your screwed frame are wide, unbending and without flexes (springs), it is a necessity to have impact-resistant lens materials and delicate handling, especially, if you have a plus refraction for reading.
Which lenses to choose?
Any brand lenses can be both screw fastened and sleeve fastened but reliability and flexibility in application can be provided only by modern strong materials. The simplest version is polycarbonate which is the strongest optic material. But it is unmanageable, has a low Abbe number and is easily damaged by various solvents. Trivex is a higher quality version. It is a bit weaker but has high optic characteristics. The latest thing is tribride. It has high optic quality and is easily workable. Unfortunately, not all diopters have affordable prices. In this case choose materials with the refraction index 1.6 or 1.67. They are stronger than 1.5 or 1.56 and available in the wide range of diopters.
Rimless glasses: transparent, tinted, sunprotective.
Whatever version you choose (showy, dynamic or trendy), high-status appearance is guaranteed. Selfconfidence, readiness to experience new things, take responsibility and solve any kind of problems… All of these is transmitted to people around you with the help of your rimless glasses image. Pay attention to news channels. Most serious presenters and politicians prefer just screw frames.If you choose a transparent version, the translucence should be of the highest quality. The less visible are the lenses the better. When fitting cosmetic slightly tinned lenses, choose a substandard sample with an irregular shape. Choose classical or conservative brands for sunprotective versions not to overelaborate your already bright image. In any case, the lightest in weight rimless glasses provide you with the highest possible comfort when constantly used.