For example, at the level of the retinal cones, the response might be in photocurrent.

Monochromacy is caused by either a defect or the complete absence of the retinal cones.

Three types of retinal cone create signals that get transformed in the visual pathway to create the perception of color.

The misanthropic novelist Michel Houellebecq, whose retinal cones register nothing but despair, ugliness and shame.

Arrestin-C also known as retinal cone arrestin-3 is a protein that in humans is encoded by the ARR3 gene.

Rod monochromacy (achromatopsia) is an exceedingly rare, nonprogressive inability to distinguish any colors as a result of absent or nonfunctioning retinal cones.

Protanopia (1% of males): Lacking the long-wavelength sensitive retinal cones, those with this condition are unable to distinguish between colors in the green-yellow-red section of the spectrum.

The most usual cause is a fault in the development of one or more sets of retinal cones that perceive color in light and transmit that information to the optic nerve.

That allows the precise measurement of the electric response of the retinal cones - cells that serve light and color vision and visual acuity - for the diagnosis of various eye diseases.

The underlying physiological mechanisms involved in color opponency include the bipolar and ganglion cells in the retina, which process the signal originated by the retinal cones before it is sent to the brain.

Models like RGB are based on what happens at the lower, retinal cone level, and thus are fitted for presenting self-illuminated, dynamic images as done by TV sets and computer displays; see additive color.

Tom Paris's world turned dull gray as he closed in on unconsciousness; under heavy-g, with blood pouring out of the brain and down toward the buttocks and abdomen, the retinal cones are the first to go, and the subject loses color vision.

Since retinal rods are insensitive to long wavelengths of light, such as red light, while retinal cones are not, the goggles enabled the physicians to adapt their eyes in preparation for the fluoroscopic procedure while still being able to perform other work.