Tag Archives: melanopsin

How many types of photoreceptor cells do we have?

Before this century, the answer was 2: rods and cones (see this textbook). However, there was good evidence that rods and cones could not account for all responses to light in mammals (1). In 2000, it was suggested that melanopsin-expressing retinal … Continue reading

Posted in circadian rhythm, electrophysiology, Leber hereditary opic neuropathy, retinal ganglion cells, sensory physiology, vision | Tagged , , | Leave a comment