Publications by authors named "Tim M Byrnes"
Purpose: We investigated the interaction between adapting field size and luminance on pupil diameter when cones alone (photopic) or rods and cones (mesopic) were active.
Method: Circular achromatic targets (1° to 24° diameter) were presented to eight young participants on a rectangular projector screen. The accommodative influence on pupil diameter was minimised using cycloplegia in the foveally fixating right eye and the consensual pupillary reflex was measured in the left eye.