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2. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   Prentice's rule is a formula to calculate the amount of prism correction in a lens based on decentration and lens power. It can be used for prescribing, tolerance control, or determining unprescribed prism in eyeglasses.

3. Intraocular lens - Wikipedia

   en.wikipedia.org/wiki/Intraocular_lens

   An intraocular lens (IOL) is a lens implanted in the eye to treat cataracts or correct vision problems. Learn about different kinds of IOLs, such as phakic, pseudophakic, multifocal, and adaptive, and how they are inserted and used.

4. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   A corrective lens is a device that improves visual perception by correcting refractive errors. Learn about the different types of corrective lenses, such as glasses, contact lenses, intraocular lenses, and their prescriptions, uses, and advantages.

5. Cataract surgery - Wikipedia

   en.wikipedia.org/wiki/Cataract_surgery

   Cataract surgery is the removal of the natural lens of the eye that has developed a cataract, an opaque or cloudy area. The eye's natural lens is usually replaced with an artificial intraocular lens (IOL) implant. Learn about the causes, symptoms, diagnosis and methods of cataract surgery.

6. Clear lens extraction - Wikipedia

   en.wikipedia.org/wiki/Clear_lens_extraction

   Clear lens extraction is a surgical procedure to remove the clear lens of the eye and replace it with an intraocular lens. It is used to correct refractive errors, treat glaucoma and prevent cataract.

7. Phacoemulsification - Wikipedia

   en.wikipedia.org/wiki/Phacoemulsification

   Phacoemulsification is a method of cataract surgery that uses ultrasonic vibration to break and remove the clouded lens from the eye. Learn about the mechanism, contraindications, complications and history of this procedure.