Vision Correction
Eyeglasses are medical devices used to correct vision problems.
Spectacles frames come in many shapes, sizes, colors, and materials. We recommend finding a pair that fits well on your nose bridge, temples and cheeks, makes you feel good, and supports the type of prescription lenses that you need.
Prescription lenses are made with a spectrum of strength, materials, and coatings detailed below.
Single vision lenses correct vision for a certain distance (far, intermediate, or near).
Bifocal lenses correct vision for 2 distances, most commonly distance and near. There is a line right below your line of sight for the closer distance. This style of lens can require an adaptation period.
Progressive lenses correct vision for 3 distances, most commonly distance, intermediate, near. The top portion of the lens is for the furthest focal point and as you look down it corrects for closer focal points. Progressive lenses tend to have some amount of distortion on the edge of the intermediate zone and require some amount of adaptation (learning to move your head and eyes to focus). The higher end lenses have the least amount of distortion and the easiest adaptation.
Eyeglass lenses are commonly made of plastic, commonly CR-39. These lenses are durable, lightweight, and provide good clarity.
Polycarbonate is a more shatterproof/impact resistant type of lens material that is highly recommended for all patients under the age of 18. It is made of a lightweight plastic that has inherent UV protection. These lenses can be slightly more expensive than standard plastic lenses.
High index and Trivex lenses are thinner plastic lenses that are recommended for patients with higher eyeglass prescriptions. These lenses are typically more expensive than standard plastic and polycarbonate lenses.
Glass lenses are no longer used due to their heavy weight and ability to shatter.
Anti-reflective coating is applied to the surface of eyeglass lenses to reduce glare and improve the cosmetic appearance of the lenses.
Anti-scratch coating is applied to the surface of eyeglass lenses to protect the surface from scratches. This type of coating makes the lens scratch resistant not scratch proof.
Photochromic lenses get darker when activated by UV light. The most common brand is Transitions. There are several different options for color and darkness intensity.
Feel free to ask your optometrist or optician for recommendations that will best suit your visual needs.
