We collected and analyzed pupil diameter data from of 7 visually normal participants to compare the maximum pupil constriction (MPC) induced by "Red Only" vs. "Blue+Red" visual stimulation conditions. The "Red Only" condition consisted of red light (640±10 nm) stimuli of variable intensity and duration presented to dark-adapted eyes with pupils at resting state. This condition stimulates the co...

Pupil dilation and blinks provide complementary, mutually exclusive indices of information processing. Though each index is associated with cognitive load, the occurrence of a blink precludes the measurement of pupil diameter. These indices have generally been assessed in independent literatures. We examine the extent to which these measures are related on two cognitive tasks using a novel meth...

Background: To compare mydriasis obtained with Tropicamide 0.8% and phenylephrine 5% in type 2 diabetic and non diabetic patients. Materials & Methods: Observational study done in Ophthalmology OPD during January to May 2013. 100 eyes from 50 patients (30 type 2 diabetic and 20 non diabetics) were dilated with tropicamide 0.8% w/v and phenylephrine 5% w/v. In both groups pupil diameters were me...