Custom prescription eyeglasses and prescription sunglasses are custom-ground lenses that correct visual abnormalities such as nearsightedness, farsightedness, astigmatism, and presbyopia, which is a progressive diminishing of one’s ability to focus on near objects related to aging. Prescription eyeglasses and prescription sunglasses accomplish this by refocusing the focal point onto the retina so that you can see clearly.

Prescription eyeglass lenses and prescription sunglass lenses can be made with either plastic or glass, but plastic is definitely the most common material these days. It is safer as well as lighter-and therefore, more comfortable, and we all know that only the comfortable pair of glasses is the one that you’ll wear!

Single Vision Lenses
Single vision lenses in prescription eyeglasses and prescription sunglasses have the same focal power throughout the lens. They are used to treat nearsightedness, farsightedness, and astigmatism.

Bifocal Lenses
People over 40 may need bifocal prescription eyeglasses-and prescription sunglasses can be made with bifocal lenses as well, which is good for reading that book on the beach. Bifocal lenses are made up of two parts: the top part helps with distance and the bottom part helps with near vision. Progressive lens bifocals are now available so that no dividing line between the two powers is visible.

Trifocal Lenses
Trifocal lenses have three fields of vision: the top for distance, middle for intermediate, and bottom for near vision. Trifocals differ from bifocals in that they are fitted higher on the eye. Trifocal lenses are also available in no-line progressives.