Scotopic measurement of normal pupil size with the Colvard pupillometer and the Nidek auto-refractor.
OBJECTIVE
To compare prospectively, pupil size with the Nidek AR700A auto-refractor and the Colvard pupillometer.


METHODS
Pupil diameter was measured in 46 eyes at 2 min intervals in a low mesopic and under photopic light conditions.


RESULTS
The mean pupil diameter was 4.8+/-1.0mm with the Colvard pupillometer and 4.8+/-0.9mm with the Nidek auto-refractor in low mesopic light conditions. The mean photopic pupil diameter was 3.3+/-0.8mm with the Colvard pupillometer and 3.9+/-0.8mm with the Nidek auto-refractor.


CONCLUSIONS
The pupil sizes are very similar with both instruments.
Mantry
Sanjay
S
Birmingham and Midland Eye Centre, Birmingham, UK.
Banerjee
Somnath
S
Naroo
Shehzad
S
Shah
Sunil
S
D000328:Adult; D003623:Dark Adaptation / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009907:Optometry / Q000295:instrumentation / Q000379:methods*; D011446:Prospective Studies; D011680:Pupil / Q000502:physiology*