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2. Toric lens - Wikipedia

   en.wikipedia.org/wiki/Toric_lens

   With modern computer-controlled design, grinding and polishing techniques, good vision corrections can be achieved for even wider angles of view by allowing certain deviations from the toric shape. This is called an atoric lens (literally, non-toric lens).

3. List of soft contact lens materials - Wikipedia

   en.wikipedia.org/wiki/List_of_soft_contact_lens...

   planned replacement contact lenses. The US Food and Drug Administration (FDA) defines soft contact lenses as: made of soft, flexible plastics that allow oxygen to pass through to the cornea. Soft contact lenses may be easier to adjust to and are more comfortable than rigid gas permeable lenses.

4. Intraocular lens - Wikipedia

   en.wikipedia.org/wiki/Intraocular_lens

   A toric IOL is a type of toric lens used to correct preexisting corneal astigmatism at the time of cataract surgery. Astigmatism can also be treated with limbal relaxing incisions or an excimer laser procedure.

5. Astigmatism - Wikipedia

   en.wikipedia.org/wiki/Astigmatism

   Once only available in a rigid, gas-permeable form, toric lenses are now also available as soft lenses. In older people, astigmatism can also be corrected during cataract surgery. This can either be done by inserting a toric intraocular lens or by performing special incisions (limbal relaxing incisions). Toric intraocular lenses probably ...

6. Contact lens - Wikipedia

   en.wikipedia.org/wiki/Contact_lens

   Contact lenses, or simply contacts, are thin lenses placed directly on the surface of the eyes. Contact lenses are ocular prosthetic devices used by over 150 million people worldwide, [1] and they can be worn to correct vision or for cosmetic or therapeutic reasons. [2]

7. Phakic intraocular lens - Wikipedia

   en.wikipedia.org/wiki/Phakic_intraocular_lens

   A phakic intraocular lens ( PIOL) is an intraocular lens that is implanted surgically into the eye to correct refractive errors without removing the natural lens (also known as "phakos", hence the term). Intraocular lenses that are implanted into eyes after the eye's natural lens has been removed during cataract surgery are known as pseudophakic.