If the person then looks at white light, all photoreceptors will send information.

It wasn't a strong light source, more like a photo cell or a photoreceptor.

The eyes are simple in structure, sometimes with just a single photoreceptor cell.

In the eye, he said, there are photoreceptors that respond to red, green and blue.

Therefore, the response of a single photoreceptor is ambiguous when it comes to color.

Eyes also can be grouped according to how the photoreceptor is made.

The photoreceptors are part of a nerve network which lead directly to the brain.

Thus defined, they need not consist of more than one photoreceptor cell.

Without proper function of the photoreceptor cells, vision is not possible.

This response is now known to have its own set of photoreceptors, the phototropins.

It sometimes happens that a person is deficient in one or more of the photoreceptors.

The eye-spots act as photoreceptors and are used to move away from light sources.

A large dynamic range is also practical in the replacement of photoreceptors.

It is required for the normal development of photoreceptors in the retina.

Several photoreceptors may send their information to one ganglion cell.

The exact mechanism of photoreceptor cell death is not clearly understood.

The retina, at the back of the eye, contains photoreceptor cells.

Industrial power would come from photoreceptors inside the shell.

The light passes through the whole cell to get to the photoreceptor pigment.

The distribution of photoreceptors across the retina is not uniform.

The distribution of photoreceptors may also change over time during development of the individual.

The most studied of the photoreceptors in plants is phytochrome.

The photoreceptor is pressed or rolled over paper, transferring the image.

In it the photoreceptors are very closely packed, and vision is most acute there.

This explains why colors cannot be seen at low light levels: only one type of photoreceptor cell is active.