Standard vision test for determination of distance vision
20/20 is a measurement of how clear your distance vision is. If your standard vision test reports 20/20, it means that you are able to see clearly at 20 feet what a person with normal vision can see clearly at 20 feet. On the other hand, if you have 20/40 vision, it means that you need to stand as close as 20 feet to see what a person with normal vision can see clearly at 40 feet.
If you have 20/15 vision, it means you see clearly from 20 feet what a person with normal vision can see clearly from 15 feet, in other words, you see a little better than the typical normal person.
Common refractive errors
Emmetropia is the condition of normal eye when parallel rays are focused exactly on the retina and vision is perfect. When light does not focus directly on the retina, the eye has a refractive error. This means that with the appropriate refractive correction lens like glasses or contact lenses, incoming light rays become focused onto the retina thus producing clear vision.
In myopia, the eye is longer than normal, preventing light rays from focusing directly on the retina. Light rays come together at a point in front of the retina, and are out of focus on the retina. Distant objects are blurred, but nearby objects are clear.
In hyperopia, the eye is shorter than normal. Light rays come together at a point behind the retina, and are therefore out of focus on the retina. Nearby objects can appear blurry, while distant objects are clearer. Sparingly farsighted patients will report that even distant objects appear blurry.
LASIK eye surgery in effective correction
LASIK eye surgery reduces the dependence on glasses and contact lens by effective correction of refractive error. Moreover laser eye surgery improves recreational activities like water sports or any contact sports without wearing glasses or contact lens.
Laser eye surgery is often a quick and painless surgical procedure that enhances your vision and eliminates the need of contact lenses or glasses. This surgery is done using laser that effectively changes shape of cornea that is clear covering of front of eye.
We educate you well about the various risks and benefits before performing the eye surgery to avoid any potential damages to your eyes.