Acommodating

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co.

The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape and pupil size (accommodation).

The remainder did require the additional help of reading glasses in order to see fine newsprint.Compared to the Crystalens accommodating lens, the Re Zoom and Re STOR multifocal lenses may allow for better near vision, sufficient enough to read newsprint.This was evident in the FDA trial of the Re STOR multifocal lens; 84% of Re STOR patients achieved 20/25 distance vision, and near vision which allowed newsprint to be easily read.In contrast, the Crytstalens incorporates both distance and near capability into a single lens by its ability to change from distance to near power while inside the eye.The Crystalens accomplishes this by use of two small hinges, which allow the lens to move forward and backward slightly inside the eye.The main advantage offered by Crystalens over a traditional, monofocal lens implant is the opportunity to become less dependent on reading glasses for near activities.Activities that were once easily enjoyed without glasses, such as reading or sewing, now require a pair of reading glasses always be available.As the power of the lens becomes stronger, its ability to bend light more sharply is increased.Since the lens is monofocal, the light can only be bent to one focus point at a time.Changes in contraction of the ciliary muscles alter the focal distance of the eye, causing nearer or farther images to come into focus on the retina; this process is known as accommodation.A near object (for example, a computer screen) appears large in the field of vision, and the eye receives light from wide angles.

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