Science Fair Project Encyclopedia
Accommodation reflex
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).
A near object (for example, a computer screen) appears large in your field of vision , and the eye receives light from wide angles. When you focus 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.
When you look at a distant object, parallel light rays enter the eye, and the pupil dilates. Muscles in the eye flatten the lens.
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details