Question

What is accomodation?
What type of vision is associated with accomodation?
Give some examples of anomalies of accomodation.

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Answer 1

Answer:

Accommodation is the process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies. In this, distances vary for individuals from the far point—the maximum distance from the eye for which a clear image of an object can be seen, to the near point—the minimum distance for a clear image.When humans accommodate a nearby object, they also converge their eyes and, as a result, constrict their pupils. However, the constriction of the pupils is not part of the process called lens accommodation. The combination of these three movements (accommodation, convergence and miosis) is under the control of the Edinger-Westphal nucleus and is referred to as the near triad, or accommodation reflex. While it is well understood that proper convergence is necessary to prevent diplopia, the functional role of the pupil constriction remains less clear. Arguably, it may increase the depth of field by reducing the aperture of the eye, and thus reduce the amount of accommodation needed to bring the image in focus on the retina

There is a measurable ratio between how much convergence takes place because of accommodation (AC/A ratio, CA/C ratio). Abnormalities with this can lead to binocular vision problems.♚

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Answer 2

$\huge\tt\blue{Accomodation}$

$\implies$ Accommodation is the adjustment of the optics of the eye to keep an object in focus on the retina as its distance from the eye varies.

☀What type of vision is associated with accomodation?

$\implies$ The youthful accommodation system allows the eye to vary its focus to obtain reasonably clear retinal images of objects at different distances.

☀Give some examples of anomalies of accomodation.

$\implies$

• Accommodative Insufficiency.
• Accommodative Infacility.
• Accommodative Fatigue.
• Accommodative Spasm.

$\huge\tt\orange{@Ꮇ᥊Ꭵⲅᥲᥲ♡}$