Photoreceptors

In vertebrates, underneath the photoreceptors is a layer of pigment and pigment cells called the choroid the squid, cuttlefish and octopus have similar arrangements - more on this later, this layer of pigment absorbs stray light that is not caught by the photoreceptors, which might reflect back and fuzz up the image. ❋ Unknown (2006)

Housed within the deepest section of the photoreceptors is a pancake-like stack of discs containing light-absorbing pigment specific for one of the three color/photon energy ranges. ❋ GERALD L. SCHROEDER (2001)

The main problem is that light-sensing cells in the macula, called photoreceptors, slowly break down. ❋ Unknown (2011)

And then there's a system of light-sensitive proteins called photoreceptors that use light as information and direct plant development and growth. ❋ Unknown (2010)

'There are about 150 million light-sensitive cells - known as photoreceptors - in each eye. ❋ Unknown (2009)

"photoreceptors", which are lost at a rate of several hundred every day. ❋ Unknown (2009)

These cone photoreceptors are sensitive to different portions of the visible spectrum. ❋ Heather McDougal (2009)

Our nervous system, on the other hand, derives color by comparing the responses to light from the [three] types of cone photoreceptors in the eye [as opposed to rods, which distinguish only dark and light]. ❋ Heather McDougal (2009)

To clarify: the macula is the name of the small area on the retina that contains the greatest concentration of our photoreceptors, "macular" is the adjective. ❋ Unknown (2011)

Prof. MURTHY: Your photoreceptors are degenerated by your eye is perfectly fine otherwise - these people are blind. ❋ Unknown (2010)

The photoreceptors die off, and affect a loss in vision. ❋ Unknown (2011)