10 Facts About Ophthalmic lenses

Intraocular Ophthalmic lenses are surgically implanted most commonly after cataract removal but can be used for purely refractive purposes.

Corrective Ophthalmic lenses are typically prescribed by an ophthalmologist or an optometrist.

Trifocal Ophthalmic lenses are similar to bifocals, except that the two focal areas are separated by a third area in the middle.

Progressive addition or varifocal Ophthalmic lenses provide a smooth transition from distance correction to near correction, eliminating segment lines and allowing clear vision at all distances, including intermediate .

Multifocal contact Ophthalmic lenses are typically designed for constant viewing through the center of the lens, but some designs do incorporate a shift in lens position to view through the reading power .

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Thick myopic Ophthalmic lenses are not usually mounted in wire frames, because the thin wire contrasts against the thick lens, to make its thickness much more obvious to others.

Glass Ophthalmic lenses have become less common owing to the danger of shattering and their relatively high weight compared to CR-39 plastic Ophthalmic lenses.

Plastic Ophthalmic lenses are currently the most commonly prescribed lens, owing to their relative safety, low cost, ease of production, and high optical quality.

The main drawbacks of many types of plastic Ophthalmic lenses are the ease by which a lens can be scratched, and the limitations and costs of producing higher-index Ophthalmic lenses.

CR-39 Ophthalmic lenses are an exception in that they are inherently scratch resistant.