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  • Title: Scotopic measurement of normal pupil size with the Colvard pupillometer and the Nidek auto-refractor.
    Author: Mantry S, Banerjee S, Naroo S, Shah S.
    Journal: Cont Lens Anterior Eye; 2005 Jun; 28(2):53-6. PubMed ID: 16318835.
    Abstract:
    PURPOSE: 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. CONCLUSION: The pupil sizes are very similar with both instruments.
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