Ophthalmic Lens is a lens which corrects the vision in a person where the focal point in the eyes does not hit the retina. They come in a variety of forms including plastic and glass lenses worn in glasses, contact lenses placed in direct contact with the eye, and lens implants surgically inserted into the eye to correct visual impairments. Basic ophthalmic lenses correct for near- or farsightedness, where the focus point lies in front of or behind the retina. They curve to adjust the focal point and let light hit the retina precisely, allowing people to focus. Other lenses can have additional features. The earliest ophthalmic lens designs were glass.
- Track 5-1 Single-Vision lens
- Track 5-2 Bifocal Lens
- Track 5-3 Trifocal Lens
- Track 5-4 Progressive Lens
- Track 5-5 Light protective Lens