Legal Blindness Visual Field
By this definition you re legally blind if your better eye when using a corrective lens has a central visual acuity of 20 200 or lower or field of vision of no more than 20 degrees.
Legal blindness visual field. Part 2 of the u s. By contrast legal blindness is defined in the united states as visual acuity that is best corrected with glasses at 20 200 or less in the better eye and or a visual field of 20 degrees or less. Or a visual field the total area an individual can see without moving the eyes from side to side of 20 degrees or less also called tunnel vision in the better seeing eye.
Someone who is legally blind would be able to read only the top line of the chart a capital e while wearing corrective lenses. Legally blind patients qualify for benefits from the government. Part 2 of the u s.
Definition of legal blindness states this about visual field. In the u s the standard definition of legal blindness is based on central visual acuity what s in front of you and field of vision what s above below and to the sides. This is a representation of a constricted visual field.
This is a representation of a constricted visual field. Statutory legal blindness is defined as. Definition of legal blindness states this about visual field.
Widest diameter of visual field subtends an angle no greater than 20 degrees in the better eye measured with goldmann iii4e or equivalent size stimulus. Or a visual field the total area an individual can see without moving the eyes from side to side of 20 degrees or less also called tunnel vision in the better seeing eye. People with legal blindness may still have some usable vision.
Best corrected visual acuity of 20 200 or less in the better eye or. Definition of legal blindness states this about visual field. Or a visual field the total area an individual can see without moving the eyes from side to side of 20 degrees or less also called tunnel vision in the better seeing eye.
A common test for visual acuity is the snellen eye chart. Legal blindness in the united stated is based on a person s inability to drive and perform daily activities. Legal blindness is defined by united states federal law and is defined as having either central visual acuity worse than 20 200 or visual field restriction of less than 20 degrees.
An eye doctor will measure visual acuity and visual field to determine if a person is legally blind. Part 2 of the u s.
