Pupillary Reaction Direct

Pupillary response (P.R.) is a physiological process that occurs in the eye when the retina is exposed to light. It represents a change in the diameter of the pupil in response to the intensity of the light flux. ZR is one of the main methods for studying the function of the eye and can be used to diagnose various diseases of the eyeball.

Direct pupillary reaction is a type of pupillary reaction in which the pupil contracts under the influence of light. This occurs due to contraction of the muscles that are located around the pupil and are responsible for its dilation and contraction. Direct pupillary response is an indicator of the normal functioning of the eye and its ability to respond to light stimuli.

Pupillary reaction can be measured using special equipment - a photometer. A photometer sends light to the pupil and measures its diameter using photocells. The received data is processed by a computer and displayed on the screen in the form of a graph.

Direct ZR is used in the diagnosis of various eye diseases, such as glaucoma, retinal dystrophy, retinal detachment, etc. It can also be useful for assessing the effectiveness of treatment of eye diseases.

In addition, direct ZR can be used as a test to determine stress and fatigue levels. If the pupil reacts to light faster than usual, it may indicate that the person is stressed or tired.

Thus, direct pupillary response plays an important role in the diagnosis and treatment of eye diseases, as well as in assessing the level of stress and fatigue in a person.



Pupillary reaction is one of the main indicators of the state of the nervous system and visual apparatus. It can be direct and indirect. With a direct reaction, the pupil contracts when exposed to light, and with an indirect reaction, it dilates. Pupillary reaction is one of the important diagnostic indicators for various diseases of the nervous system, eyes, endocrine system, etc.

Pupillary response may be normal when the pupil responds to light as it should. However, if the pupil does not respond to light or reacts incorrectly, this may indicate various diseases or disorders of the nervous system.