WHO classification of visual acuity

Question 1

Normal Vision:

Answer 1

Visual acuity of 6/6 (20/20) or better.

Question 2

Mild Visual Impairment:

Answer 2

Visual acuity worse than 6/6 (20/20) but better than or equal to 6/18 (20/60).

Question 3

Moderate Visual Impairment

Answer 3

Visual acuity worse than 6/18 (20/60) but better than or equal to 6/60 (20/200).

Question 4

Blindness Category 1

Answer 4

Visual acuity worse than 3/60 (20/400) but better than or equal to 1/60 (5/300) or counting fingers at 1 meter.

Question 5

Blindness Category 2

Answer 5

Visual acuity worse than 1/60 (5/300) or counting fingers at 1 meter but better than or equal to light perception.

Question 6

Blindness Category 3

Answer 6

No light perception.