The Focusing Mechanism
The focusing mechanism of the eye consists of the lens, which is completely encircled by the ciliary muscles and attached to them by the suspensory ligaments. In distant vi...
The Focusing Mechanism
The focusing mechanism of the eye consists of the lens, which is completely encircled by the ciliary muscles and attached to them by the suspensory ligaments. In distant vision the ciliary muscles are relaxed and the lens is pulled flat. It does little focusing because the almost parallel light rays from the distant object need to be only slightly refracted to bring them to a point on the retina. In near vision, the ciliary muscles contract, the suspensory ligaments loosen and the lens becomes more convex. The curved surface of the lens reinforces the cornea's focusing of the more divergent rays from the near object.
Like to rate videos and let people know what you think?
Automatically share your ratings, favorites, and more on Facebook, Twitter, and Google Reader with YouTube Autoshare.
Autoshare makes certain YouTube activities public on the services you choose. Select only the services you are comfortable with - like Facebook, Twitter, or Google Reader - to let your friends know what you like on YouTube. You can turn Autoshare off at any time.
Like to share videos with friends?
Automatically share your ratings, favorites, and more on Facebook, Twitter, and Google Reader with YouTube Autoshare.
Autoshare makes certain YouTube activities public on the services you choose. Select only the services you are comfortable with - like Facebook, Twitter, or Google Reader - to let your friends know what you like on YouTube. You can turn Autoshare off at any time.
Behavioral optometry believes focus is attained by the muscles that control the shape of the whole eye ball, not the lens. This means that many visual problems can be corrected by exercises.
Because the ciliary muscles are a sphincter so when it contracts it gets pulled CLOSER to the lens, which allows the zonules to not be as taught and the lens to take its natural shape.
The FDA called an EMERGENCY PANEL DISCUSSION on LASIK Surgery: April 25th, 2008. Google LASIK FDA. The FDA knows there is something wrong and has estimated about 600,000+ Americans permanently damaged from LASIK. How does this effect you and I? Hurt Patients driving your kids school buses, driving trains, flying your plane, operating your balance sheets, etc...Do you get how it effects you now? Don't do LASIK and risk your eyesight. Many patients have committed suicide. You may be next.
Autoshare makes certain YouTube activities public on the services you choose. Select only the services you are comfortable with - like Facebook, Twitter, or Google Reader - to let your friends know what you like on YouTube. You can turn Autoshare off at any time.
It was a really information to me.