Cm. Howard et al., Time course of early mesopic adaptation to luminance decrements and recovery of spatial resolution, VISION RES, 40(22), 2000, pp. 3059-3064
The time course of recovery of spatial resolution following adaptation to a
uniform field was measured for test probes presented at lower illuminance
than the adapting field. Six observers were tested in a Maxwellian-view sys
tem using 20 degrees adapting fields of 1.6-2.6 log photopic trolands. Test
stimuli were 7 degrees, 250 ms Gabor patches (1 and 6 cpd) of mean retinal
illuminance 2-3 log units lower than the adapting field. During the 9 s af
ter adapting field offset, contrast thresholds for orientation discriminati
on followed an exponential-decay function and showed longer recovery times
for larger illuminance decrements and higher spatial frequency. (C) 2000 El
sevier Science Ltd. All rights reserved.