Your glasses usually determine how happy you are with your eyewear. But it’s not simple to purchase eyeglass lenses. Actually, the magazine Consumer Reports said, “There are so many options for lenses and coatings, that we can easily confuse what’s worth buying.”
When you buy glasses, the frame you choose is essential for your appearance and comfort. On other hand your choice of glass lenses influences: appearance, comfort, vision and safety. A common mistake often occurs when you buy eyeglasses and do not take sufficient time to consider your choices of lens materials, designs and coverings.
The following lens treatments should be considered essential for the most comfortable, durable and best looking glass:
Anti-scratch coating. All lightweight lens materials contain surfaces that are much smoother and more likely than glass lenses to scratch or abrasion. The most impact-resistant is the softest eyeglass lens, polycarbonate. However, all plastic lenses and high index lenses need an anti-scratch factory layer for an adequate lens durability. Most modern coverings can render your glass lenses as scratch-resistant as glass (also called scratch coats or tough coats).
Antireflective coating. An anti-reflective coating enhances all lenses . AR coatings remove lens reflections, particularly at night, which reduce contrast and clarity. They also render your lenses almost invisible, so you can create a better eye contact and reflections in your lenses will not distract you and others. In photographs, AR-coated lenses are also much less probable to have glare spots.
Anti-reflective coating is particularly essential when choosing high-index lenses because the greater the lens material refractive index, the more light the glasses reflect. High-index lenses can actually be up to 50% lighter than CR-39 lenses, generating much more glare unless AR covering is used.
UV-blocking treatment. Sun damaging ultraviolet (UV) radiation has been associated with age-related eye issues, including cataracts and macular degeneration.
Therefore, people should protect their eyes against harmful UV light. Fortunately, thanks to the absorptive properties of the lens material, polycarbonated lenses and almost all plastic lenses have 100 % UV protection.
However, if you choose plastic lenses CR-39 please be aware that they require an additional covering to offer equivalent UV protection.
Photochrome treatment. In reaction to sunlight and high-energy visible (HEV) light rays, this lens treatment allows eye glass lenses to automatically darken and rapidly return transparent when indoors. Photochrome lenses are available for almost all lens materials and designs.
To be more satisfied with your eyewear, ask your eye doctor which lenses meet your specific requirements and eyeglass prescription.