For certification of blindness in India, a person may be classified as blind even if visual acuity in the better eye is better than 3/60, provided another criterion involving the visual field is met. This criterion is constriction of the field of vision to less than:

• A 5 degrees around the point of central fixation
• B 10 degrees around the point of central fixation ✓
• C 15 degrees around the point of central fixation
• D 20 degrees around the point of central fixation

Explanation

Indian certification criteria define blindness as visual acuity below 3/60 in the better eye with best correction, or a field of vision constricted to less than 10 degrees around the central fixation point in the better eye. The 10-degree cut-off also appears in the WHO low vision definition, making it consistent across classifications. Options of 5, 15 and 20 degrees do not correspond to any recognised certification threshold.

Reference: Parsons' Diseases of the Eye, 23rd ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.