What Are Multifocal Eyeglass Lenses? If you're in your mid-40s or older, you probably have glasses with multifocal lenses, like bifocals or trifocals. These have two or more prescriptions to correct your vision. In the past, you could spot this type of lens by the line between the two s...
If you can shape, whittle, or 3D-print a material, chances are you can make glasses frames out of it. People have worn glasses made of precious metals, wood, horn, and even bone. These materials usually aren’t as long-lasting or strong as metal and acetate, however. ...
Is my contact lens prescription different than my eyeglass prescription? Yes, your contact lens prescription is different from your eye glasses prescription because it includes base curve, diameter and material or brand, which are all specifications unique to contact lenses. These specifications ensure ...
Eyeglass prescriptions from opticians typically show the strength of the corrective lenses you need in diopters.The focal length isn't the only important feature of a lens. Bigger lenses gather more light than smaller ones, so they make a brighter image. This is particularly important if you're...
Cloth patch.As it sounds, a cloth patch is made of soft fabric. It usually has a string you wrap around your head that holds it in place. It doesn’t stick to your skin and is washable and reusable. Eyeglass lens cover.If your childwears glasses, a lens cover patch is a great opti...
There are many different types of telescopes available for those interested in exploring the night sky. Telescopes come in a variety of designs, some of which have been around since the 1600s. The first type of telescope ever designed was a refractor, designed by an eyeglass maker in the ...
Some people use special lenses to enhance color perception, which are filters available in eithercontact lensor eyeglass lens form. One example arecolor blind glassesdeveloped byEnchroma. The tinted lenses in Enchroma's color blind glasses include patented light-filtering technology to give people with...