The eye allows us to see and interpret the shapes, colors, and dimensions of objects in the world by processing the light they reflect or give off. The eye is able to see in dim light or bright light, but it cannot see objects when light is absent. The eye changes light rays into electrical signals then sends them to the brain, which interprets these electrical signals as visual images.
The eye is set in a protective cone-shaped cavity in the skull called the orbit or socket and measures approximately one inch in diameter. The orbit is surrounded by layers of soft, fatty tissue which protect the eye and enable it to turn easily. Six muscles regulate the motion of the eye. Among the more important parts of the human eye are the iris, cornea, lens, retina, and the optic nerve.
When the curvature of the cornea or”steepness” does not match the length of the eye, light rays do not focus clearly on the retina, and glasses or contact lenses are required to correct nearsightedness or farsightedness. The cornea is ideally shaped like the surface of a basketball, but if it is shaped more like a football, this creates astigmatism, which also requires correction with glasses or contact lenses, and is routinely corrected in the LASIK procedure.
Theres a new wave in LASIK/PRK. The Food and Drug Administration approved a new technology that will change how we view your vision problems. Its called custom LASIK/PRK: the laser eye treatment is based upon the very unique visual characteristics of you eye. Up until now, with glasses, contacts and covential LASIK surgery, correction were quite similar for each type of prescription myopia, hyperopia and astigmatism.
Custom LASIK/PRK involves measuring the eye from front to back, using whats called wavefront technology, to create dimensional (3-D) corneal map. The information contained in the map guides the laser in customizing the treatment to your individual visual irregularities. Prior to the advent of wavefront technology no two people with the same prescription would receive the same glasses, contacts or LASIK procedure.
Potential Benefits of Custom LASIK/PRK
Wavefront technology is groundbreaking because it has the potential to improve not only how much you can see, visual acuity measured by the standard 20/20 eye chart, but also how well you can see, in terms of contrast sensitivity and fine details. This translates into a reduced rish of post-LASIK/PRK complications, such as glare, halos and difficulty with night vision.
Custom LASIKS/PRKS Advantage Lies in the Area of Quality Vision
- Greater chance of achieving 20/20 vision
- Greater chance of achieving better than 20/20 vision
- Reduced chance of losing best corrected vision
- Reduced chance of losing visual quality or contrast sensitivity
- Reduced chance of night-vision disturbances and glare