Optometrist & ophthalmologist 👀 on Instagram‎: "retina.review Photopigment Bleaching Phenomenon ✓Rhodopsin is a visual pigment concentrated in rod photoreceptor outer segments that absorbs the excitation beam and decreases autofluorescence. ✓However, with continued exposure to light, rhodopsin undergoes photo-isomerization. It loses its absorptive capabilities, resulting in a progressive increase in autofluorescent signal. ✓Termed the bleaching effect, rhodopsin absorption and photo-isomerizati