Wednesday, April 11, 2007

Your Eye & what could happened to that

Many people often describe your eyes worked similar to camera in the recent technology. In the camera, light passes all the way through a lens system back onto the film. Your eyes consist of cornea and lenses at the front (anterior chamber) that act as a lens system and retina at the back (posterior chamber) that work as a film. Clear image is produced by the light rays of an object that go throughout to cornea and lens and are focused directly on the retina.

But one of these conditions could happen to your eyes:

1. Can only see object clearly at the close/ short distance

This condition is called Myopia (Nearsightedness). What happened is that the light rays are passed through the cornea and lens but the point at which they converge (focus) is in front of the retina, not on the retina. To correct this condition there is 2 options, first non surgical and second surgical treatment. Non- surgical treatment options for myopia include glasses and contact lenses. Surgical treatment is divided into two laser and non laser eye surgery. Surgical treatment options include ALK, clear lens extraction, LASEK, LASIK, LASEK, phakic IOL and RK. Before they do the treatment they should review in detail with their physicians to choose which treatment is the best one for patient’s eye condition because not all individuals are good candidates for specific procedures.

2. Can only see object clearly at a long distance/ far away.

This condition is called Hyperopia (Farsightedness). In a hyperopic eye, the light rays do not meet or focus by the time they reach the retina. Hyperopic patients can focus on more distant objects, but not images that are close at hand. To correct this condition there is two options non surgical and surgical treatment which is basically almost the same with number one above.

3. Astigmatism

With astigmatism, the rays of light do not meet into a single point but form a line on the retina. There are three types of astigmatism included regular, mixed and irregular astigmatism. Currently, Laser Eye Surgery in the US is approved for treatment of regular and mixed astigmatism. Latest advances in technology now allow for the therapeutic treatment of induced irregular astigmatism. In the future, this application may be expanded to take account of all types of irregular astigmatism.

4. Presbyopia

Presbyopia affects people as they come into their 40s. Caused by changes within the eye's crystalline lens as one ages, presbyopia affects everybody, and sooner or later everyone will need to put on reading glasses or bifocals. Presbyopia is not affected by the laser eye surgery.