Visual acuity test

Injury Disease Nutrition Poison Symptoms Surgery Test Special Topic

1 2 5 A B C D E F G H I J K L M N O P Q R S T U V W X

Eye Visual acuity test Normal, near, and farsightedness

Overview Risks Results

Visual acuity test

Visual acuity is expressed as a fraction. The top number refers to the distance you stand from the chart. This is usually 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 visionfrom 40 feet away.

Abnormal results may indicate that you need corrective lenses to obtain normal vision, or may indicate an eye condition requiring further evaluation.

Related topics:

• Nearsightedness
• Farsightedness
• Presbyopia
• Amblyopia (lazy eye)

Email this page  Printer friendly  Bookmark this page