Accommodation reflex
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The accommodation reflex is a reflex action of the eye, in response to focusing on a near object, then looking at distant object (and vice versa). It is dependent on cranial nerve II (afferent limb of reflex), higher centres and cranial nerve III.
A near object (for example, a computer screen) appears large in the field of vision, and the eye receives light from wide angles. When focusing on a near object, the pupil constricts in order to prevent diverging light rays from hitting the periphery of the retina and resulting in a blurred image. As the pupil constricts, the lens becomes more spherical to allow for the diverging light rays.
See also
External links
- [Accommodation]
- [Exam of cranial nerve II] - accommodation is usually tested as a part of this exam.
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