IMPORTANT POINTS:
- Done in each eye separately.
- Visual acuity must be 20/80 or better for reliable results.
- Eye is exposed to bright light for 10 seconds, source is held 2-3 cms from the eye.
- Ask the patient to read previously read best visual acuity line immediately after withdrawl of light source and the recovery time is noted.
- Normal recovery time is 45-60 seconds.
- Prolonged recovery time upto 180 seconds or more in patients with maculopathy.
- Normal recovery time in optic neuropathy.
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