Lasik Eye Surgery

Visual acuity is clearness of vision, particularly form vision, which is dependent on the sharpness of the retinal focus within the eye and the sensitivity of the interpretative faculty of the brain.

For visual acute testing you need to walk near by your eye care center and consult with your ophthalmologist.  At eye care center you will be asked to take away your glasses or contacts and stand or sit 20 feet from the eye chart.  Now at initial stage you have to open your both eyes then you will smoothly cover one eye with the palm of your hand and read the letters. If you are not able to read the letters, you may guess. This examination is done on each eye, one at a time.

Visual acuity is defined as a fraction. There are two numbers: Top number and second one is Bottom number. The top number shows the distance you stand from the chart. This is generally 20 feet. The bottom number indicates the distance at which a person with normal eyesight could read the same line you correctly read. For example, 20/20 is considered normal. 20/40 indicates that the line you correctly read at 20 feet can be read by a person with normal vision from 40 feet away.

Abnormal outcomes may be a signal that you require glasses or contacts, or may mean that you have an eye condition that needs further evaluation by an ophthalmologist.