Pupil Gauge

1 mm

2 mm

3 mm

4 mm

5 mm

6 mm

7 mm

8 mm

9 mm

Hold beside the patient's eye. Anisocoria > 1 mm is clinically significant; compare in dim and bright light (worse in dark → Horner / sympathetic; worse in light → CN III, pharmacologic, Adie).

Uncalibrated