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Aim:

We aimed to estimate the prevalence of physiological anisocoria and also evaluate the accuracy of clinical assessment of anisocoria employed in routine bedside examination.

Materials and Methods:

A total of 708 voluntary subjects between the ages of 20–69 years who had no history of ophthalmologic or neurological disease other than refractive error were included in the study. In a closed room with uniform ambient lighting, the subjects' pupils were examined clinically and the presence or absence of anisocoria was recorded. This was followed by photography of the subjects' pupils using a digital camera secured on a tripod at a fixed distance from the subject's face. A difference in pupillary size of 0.4 mm or more was considered anisocoria.

Results:

Of the 708 subjects, 361 (51%) were males. The average pupillary diameter of the subjects was 4.99 mm. Ninety-seven (13.7%) had measured anisocoria on …