photo-, phot-, -photic +

Ocular inflammation; especially, of the conjunctiva, due to intense light.

1. Relating to vision with the normal eyes in bright light; for example, day vision.
2. Pertaining to vision in the light; said of the eyes which have become light-adapted.
3. Sometimes applicable to seeing what appears to be sparks in front of the eyes.

1. A pigment, such as a retinal pigment, that is unstable in the presence of light.
2. Pigment involved in photosynthesis in plants which includes chlorophyll, carotenoids, and phycobilins.

An appearance as of sparks, or flashes, resulting from retinal irritation.

Sneezing caused or evoked by the influence of bright light.

A device for testing the acuity of vision by determining the smallest amount of light that will render an object barely visible.

Measurement of the least illumination required for eyesight.

Describing a molecule that gathers light and converts it into energy.

1. The oxidation of carbohydrates in plants with the release of carbon dioxide during photosynthesis.
2. A process in which an organism takes in oxygen and releases carbon dioxide in the presence of light, occurring during photosynthesis in conditions in which there is a low concentration of carbon dioxide and intensive levels of light.

Inflammation of the retina due to exposure to intense light which may result in transient central scotoma.

1. A burn in the retina of the eye from excessive exposure to sunlight.
2. A central retina burn from excessive exposure to sunlight or other intense light (e.g. the flash of an electrical short).
3. Thermal damage to the retina because of intense light.

This nomenclature (“light lizard”) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Chasmosaurus.

A type of fluoroscope with a hand-held imaging screen.

A fluoroscope is an instrument for visual observation of the body by means of x-rays.

The patient is put into position with the part to be viewed placed between an x-ray tube and a fluorescent screen. X-rays from the tube pass through the body and project the bones and organs as images on the screen.

The advantage of the fluoroscope is that the action of joints, organs, and entire systems of the body can be observed directly.

1. Reacting to incident electromagnetic radiation, especially visible, infrared, and ultraviolet light.
2. Exhibiting an abnormally heightened reactivity to sunlight.

Sensitivity to light.