Repeatability of retinal sensitivity measurements using a medmont dark-adapted chromatic perimeter in healthy and age-related macular degeneration cases

Abstract

Purpose: To determine the intrasession and intersession test–retest repeatability of retinal sensitivity measurements using a dark-adapted chromatic perimeter (DACP). Methods: For intrasession testing, retinal sensitivity within the central 24° for the 505-nm stimulus was measured after 20, 30, and 40 minutes of dark adaptation (DA) and for the 625-nm stimulus was measured after the first and second 505-nm tests. For intersession testing, retinal sensitivity for both stimuli was measured after 30 minutes of DA at baseline and 1 month. The point-wise sensitivity (PWS) difference and coefficient of repeatability (CoR) of each stimulus and group were determined. Results: For intrasession testin..