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Delayed dark adaptation may herald AMD
Delayed rod-mediated dark adaptation in older adults with normal macular health may be associated with the incidence of early age-related macular degeneration 3 years later, according to a study.People in the early phase of AMD have slowing in the recovery of light sensitivity by rod photoreceptors after exposure to bright light. Therefore, previous evidence has supported biological probability that rod-mediated dark adaptation could be a functional biomarker of AMD.