Constant luminance (cd·s/m²) versus constant retinal illuminance (Td·s) stimulation in flicker ERGs.

ABSTRACT:

Purpose

To compare the effect of variable pupil size on the flicker electroretinogram (ERG) between a stimulus having constant luminance and a stimulus having constant retinal illuminance (constant Troland) that compensates for pupil size.

Methods

Subjects (n = 18) were tested with 12 pairs of the stimuli. The stimulus pair consisted of the ISCEV standard constant luminance stimulus (3 cd·s/m² with a 30 cd/m² background) and a constant retinal illuminance stimulus (32 Td·s with a 320 Td background) selected to provide the same stimulus and background when the pupil diameter is 3.7 mm. Half the subjects were artificially dilated, and their response was measured before and during the dilation. The natural pupil group was used to assess intra- and inter-su

SUBMITTER: Davis CQ 

PROVIDER: S-EPMC5364250 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature