Why people choose LASIK eye surgery?
Many people who opt for LASIK eye surgery ofter wear glasses or contact lenses because they suffer from at least one of the following eye conditions: myopia, hyperopia, astigmatism or presbyopia. They are often tired of wearing contact lenses or glasses, which interfere with their normal daily activities. The primary goal of LASIK eye surgery is to focus images on the retina as in a normal eye.
Anatomy of the eye
The image to the right is the anatomy of the human eye. The clear front surface of the eye that covers the colored part of the eyes is called the cornea, which does 2/3 of the focusing when looking at objects. This is the part of the eye that we work on during LASIK eye surgery. The iris is the colored part of the eye. Depending on how much light is entering the eye, the iris has the ability to enlarge or shrink like a shutter in a camera. Located behind the iris is the lens, which, allows you see far or near by focusing on objects. The retina is located in the back of the eye and acts like the film of a camera. As you see images, it sends those image messages to the optic nerve that then delivers that message to your brain. This is how we see things. Things have to be focused by the cornea, focused by the lens and then focused directly on the retina and then that information goes out to the optic nerve to the brain.
- Myopia or nearsightedness
- This is caused by the cornea being too steeply curved. So images are focused in front of the retina. LASIK eye surgery is used to make the cornea flatter.
- Hyperopia or farsightedness
- This is caused when the cornea is too flat, so images are focused in back of the retina. LASIK eye surgery is used to make the cornea more steeply curved.
- Astigmatism is when the cornea is shaped more round on one side of the cornea; sort of like one side of a football or the back of a teaspoon. A normal shaped cornea is shaped fairly round like a basketball. With astigmatism, you end up getting 2 images, instead of one, one in front of the retina and one in back of the retina. LASIK eye surgery reshapes the cornea from a football shaped eye into a nice round basketball shaped eye. The goal is to get one image focused on the retina.
- Unlike myopia, hyperopia and astigmatism, presbyopia is not due to cornea curvature, it is due to the inability of the lens to focus. It happens to people that are over the age of 40 years old. From a LASIK perspective, one option to correct presbyopia is monovision. Monovision is when one eye is corrected for distance and the other eye is corrected for near.
If you suffer from any of the mentioned eye conditions, LASIK eye surgery at EyeSight Hawaii (locations in Kahului, Maui and Honolulu, Hawaii) may be right for you. To see if you are a candidate for this procedure, call our Honolulu, Hawaii 808-735-1935 today for a complimentary LASIK consultation with Dr. Olkowski.