photopic vision

During photopic vision, people are most sensitive to light that is greenish-yellow.

Photopic vision is the vision of the eye under well-lit conditions.

This is a standardized function which represents the response of a "typical" eye under bright conditions (photopic vision).

This is because under high light levels typical during the day (photopic vision), the eye uses cones to process light.

Adaptation is much faster under photopic vision.

Man's acuity is thus centered on photopic vision, as seems right since he is a creature of the daylight.

The traditional method of measuring light assumes photopic vision and is often a poor predictor of how a person sees at night.

When adapted for bright conditions (photopic vision), the eye is most sensitive to light at a wavelength of 555 nm.

Photopic vision is characteristic of the eye's response at luminance levels over three candela per square metre.

Photopic vision has excellent color discrimination ability, whereas colors are indiscriminable under scotopic vision.

Even the one octave of visible light is not featureless, at least not to normal individuals and not in photopic vision.

Above a certain luminance level (about 0.03 cd/m2), the cone mechanism is involved in mediating vision; photopic vision.

Mesopic vision is a combination of photopic vision and scotopic vision in low but not quite dark lighting situations.

Studies have shown that T. europaea does have photopic vision, contrary to popular belief that all moles are blind.

Many research animals (such as rats and mice) have limited photopic vision - as they have far fewer cone photoreceptors.

By using red lights, or wearing red goggles, the cones can receive enough light to provide photopic vision (namely the high-acuity vision required for reading).

Adaptation can occur in 5 minutes for photopic vision but it can take 30 minutes to transition from photopic to scotopic.

Note that the eye has different responses as a function of wavelength when it is adapted to light conditions (photopic vision) and dark conditions (scotopic vision).

Mesopic vision occurs in intermediate lighting conditions (luminance level 10 to 1 cd/m2) and is effectively a combination of scotopic and photopic vision.

Their retinas generally have both rod cells and cone cells (for scotopic and photopic vision), and most species have colour vision.

In humans and many other animals, photopic vision allows color perception, mediated by cone cells, and a significantly higher visual acuity and temporal resolution than available with scotopic vision.

It is known that the rod cells are more suited to scotopic vision and cone cells to photopic vision, and that they differ in their sensitivity to different wavelengths of light.

In contrast, cone cells are less sensitive to the overall intensity of light, but come in three varieties that are sensitive to different frequency-ranges and thus are used in the perception of colour and photopic vision.

The Purkinje shift is the relation between the absorption maximum of rhodopsin, reaching a maximum at about 500 nm, and that of the opsins in the long-wavelength and medium-wavelength cones that dominate in photopic vision, about 555 nm.