This page will provide you with many useful tips to learn about the “eyewear universe” and all its little secrets. It will thus be easier to orient yourself towards a safe purchase by choosing a valid, comfortable visual aid suitable for all personal needs.
Sight is an essential asset for the active life of every individual. Sight is the joy of life and becomes a problem only when the most elementary prevention rules are neglected. A timely assessment of your visual condition will minimize the accumulation of negative effects.
Technological evolution provides lighter, thinner, and aesthetically pleasing lenses for your eyewear. The glasses will be part of the many pleasant accessories related to your lifestyle.
The Glasses
For a more informed purchase, all the elements that contribute to the formation of a pair of glasses should be considered.
Vision: lenses, which differ in materials, diameters, and optical combinations, are the first fundamental element to consider. Once you have established the extent of the defect to be corrected and the type of lens to be used, you will have to choose the most suitable frame that respects its characteristics. Eyewear, which has become a fashion accessory, must still respect the corrective functions.
Aesthetics: at this point, you can begin to evaluate your face in harmony with the glasses. Imagine it as a hairstyle to be experienced with the taste of the new. The great variety of models, shapes, colors, brands will allow you to find the solution to make your personality more attractive.
The technique: the value of the optometrist lies precisely in the mix of technical-professional skills with which he will create the “eyewear” product by calculating the specific parameters of your eyes in close relation to the frame on your face. The most appropriate choice of materials will allow you to wear glasses without highlighting the corrective effect or minimizing it.
The comfort: when using glasses for the first time, when changing the power of the lenses or when adopting multifocal lenses, a short adaptation period is required. In addition to the moment of the most suitable choice, the optometrist will continue his assistance according to the best comfort of use.
The Focal
To choose your eyewear correctly: It is necessary to evaluate which type of solution best matches your characteristics and the activity mainly carried out with the optometrist.
Single vision near vision glasses: offer a clear and comprehensive field of view at a working distance; the distance vision appears blurred. Improper use could cause unnecessary and harmful fatigue.
Single vision glasses for distance: they ensure good dynamic and spatial vision. In the presence of presbyopia, however, they do not allow an equally good near vision. Depending on the case, they must be removed or replaced with obvious discomfort.
Bifocal glasses: in a single lens, there is a small segment that can be of various shapes and which allows you to obtain a good near vision and a good and vast distance vision at the same time.
It is beneficial when a well-defined distance vision is required up close; however, they do not allow good intermediate distance vision. Moreover, even if in a subdued way, they highlight the double correction.
Multifocal glasses: progressive focal lenses are the product of the latest optical technology. They allow the wearer a constantly focused vision at any distance allowing naturalness and safety in movements. The newer types eliminate or otherwise minimize the initial adaptation time.
Aesthetically excellent, progressive lenses look like any mono-focal lens.
The Lenses
The following factors must be considered in the choice of lenses. The materials are essential of two types: mineral glass (less and less used) and organic resin (impact resistant). The most recent technologies developed by the great world industries allow today to obtain excellent performances in both cases.
The refractive indices: they have been realized through the composition of new materials. This is to obtain thinner and lighter lenses able to meet the aesthetic and comfort needs of modern eyewear.
Treatments: on all lenses, particularly on medium and high refractive index lenses, specific treatments are recommended to improve the quality of vision.
The hardening or resistance treatment is applied to unbreakable lenses in order to preserve the integrity of the optical surfaces as long as possible.
The coloring treatments to protect from sunlight are available in various shades or shades for any condition of use. The most recent allows, in addition to the high absorption of harmful rays, a better vision. Photochromic allows the lenses to react to light, which becomes darker the stronger the light itself and gradually returns lighter in the dark.
The anti-reflective or maximum transparency treatment virtually eliminates the reflections produced on the surfaces of the lenses that disturb vision and can be harmful. They improve the contrast of the perceived image and obtain a pleasant aesthetic value. Eliminating the mirror effect allows the interlocutor to see your eyes in their natural state, without altering your expressive capacity, as if the lenses did not exist.
When we talk about the anti-reflective treatment, we often believe that it is precisely the opposite of the function that this treatment plays. The anti-reflective treatment does not remove and much less decrease the phenomenon of glare, but it eliminates the reflections that form on the surfaces of the lenses.
We Can Divide These Reflexes Into Three Main Classes
The first refers to the reflections formed on the external surface of our lenses and are highlighted in the vision of the surrounding images on them or in the reflection of the flash reproduced in a photo that portrays us.
The second is the reflection that is generated by the inner surface of the lenses. If we find ourselves with a light source behind us, this could reflect and dazzle us. Or, we may see images of objects placed behind us reflected.
The third is caused by the two internal surfaces of the lenses. In the case of night driving, it is the most annoying and sometimes dangerous phenomenon because it causes a doubling of the point light sources such as, for example, the headlights of the vehicles we cross.
To conclude, we can say that modern anti-reflective treatments include anti-scratch, anti-dirt and water-repellent ones.
Modern technology offers such sophisticated products as to approach the absolute natural vision of the eye. Your optometrist optician knows all its characteristics and is the most competent person to guide you in the right technical choice.
The Frame
Technical needs and different visual problems condition the choice of the frame. In metal, celluloid, or titanium; pleasant or nylon; signed or not, the range is extensive to satisfy everyone’s aesthetic and fashion needs.
Precalibrated Processing
The precalibrated processing, or template processing, consists in building a lens “tailored” for the chosen eyewear and allows for reduced thicknesses both in the center and at the edges, with a reduction in the weight of the lens and an improvement in aesthetics. This process aims to reduce the thickness of the lens as much as possible without compromising its optical quality.
This process can be performed on all mono-focal, toric, and bifocal lenses with positive powers higher than 2 D. and with astigmatism against the rule + – 20 ° on the axis.
In the case of progressive lenses, this process takes on significant meanings since it can be extended to all positive spherical and toric lenses and to those having neutral power for distance with an addition greater than 2 D. This means that in the great majority of cases, it is possible to improve the aesthetics of the lens with thickness reductions up to 50%.
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