Visual cycle refers to
Visual cycle In the retina of living animals, under constant light stimulation, a steady state must exist under which the rate at which the photochemicals are bleached is equal to the rate at which they are regenerated. This equilibrium between the photodecomposition and regeneration of visual pigments is referred to as visual cycle. Reference :- A K KHURANA; pg num:-14,15
Day vision and colour vision
Cycle of night vision and colour vision
Alternate distance and near fixation
Photodecomposition and regeneration of visual pigments
Anatomy, Development and clinical examination