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2. Multifocal intraocular lens - Wikipedia

   en.wikipedia.org/wiki/Multifocal_intraocular_lens

   People who have a multifocal intraocular lens after their cataract is removed may be less likely to need additional glasses compared with people who have standard monofocal lenses. [2] People receiving multifocal lenses may experience more visual problems, such as glare or haloes (rings around lights), than with monofocal lenses.

3. What to Expect at Cataract Surgery - AOL

   www.aol.com/expect-cataract-surgery-173941533.html

   After the surgery, Trief says patients’ vision improves, and they are less reliant on glasses, though most people will still need glasses for some tasks, such as reading.

4. Intraocular lens - Wikipedia

   en.wikipedia.org/wiki/Intraocular_lens

   Before surgery (natural crystalline lens, left). After surgery (implanted PCIOL, right). An anterior chamber IOL (ACIOL) Posterior chamber IOL (PCIOL). This is by far the most common type of implanted lens after cataract surgery, as this is the natural and optimum position for a lens. [citation needed] Anterior chamber IOL (ACIOL). A less ...

5. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Glasses or "spectacles" are worn on the face a short distance in front of the eye. Contact lenses are worn directly on the surface of the eye. Intraocular lenses are surgically implanted most commonly after cataract removal but can be used for purely refractive purposes.

6. Optics and vision - Wikipedia

   en.wikipedia.org/wiki/Optics_and_vision

   Glasses or "spectacles" are corrective lenses worn on the face a short distance in front of the eye. Contact lenses are worn directly on the surface of the eye. Intraocular lenses are surgically implanted most commonly after cataract removal, but recently for purely refractive purposes. Myopia (short sightedness) requires a divergent lens ...

7. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]