Dark adaptation is a research area in visual neuroscience that investigates the physiological and psychophysical processes by which the visual system regains sensitivity after exposure to bright light and subsequent transition to low-luminance conditions. Studies focus on the time course and mechanisms of photoreceptor recovery, particularly the differential contributions of cones and rods, photopigment regeneration in the outer segments, and changes in retinal circuitry and gain control. Experimental approaches typically include threshold measurements, electroretinography, and imaging or molecular techniques to elucidate the underlying biochemical pathways, receptor dynamics, and their modulation by genetic, pharmacological, or pathological factors.
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