light reflex

reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
Syn: ↑pupillary reflex, ↑miosis, ↑myosis
Derivationally related forms: ↑myotic (for: ↑myosis), ↑miotic (for: ↑miosis)

Useful english dictionary. 2012.

Look at other dictionaries:

  • light reflex — see pupillary reflex * * * 1. cone of light. a circular spot of light seen reflected from the retina with the retinoscopic mirror. 2. pupillary r. (def. 1) …   Medical dictionary

  • light reflex — reflection of light, quality of light beams to bounce back from a surface …   English contemporary dictionary

  • light reflex — see pupillary reflex …   The new mediacal dictionary

  • Pupillary light reflex — The pupillary light reflex is the reduction of pupil size in response to light.The pattern of pupillary response to light can help determine which of the cranial nerves is damaged. TypesThere are two types of response assessed for each eye:cite… …   Wikipedia

  • consensual light reflex — stimulation of one eye by light produces a reflex response in the opposite pupil …   Medical dictionary

  • direct light reflex — contraction of the sphincter iridis and reduction of the size of the pupillary aperture immediately after a ray of light is thrown upon the retina through the pupil …   Medical dictionary

  • emergency light reflex — contraction of the pupils, closure of the eyelids, and lowering of the eyebrows.upon excessive stimulation of the retina by light …   Medical dictionary

  • Рефлекс Зрачковый (Pupillary Reflex), Рефлекс Световой (Light Reflex) — рефлекс, приводящий к изменению размеров зрачка в зависимости от количества попадающего в глаз света. Так, при попадании на сетчатку яркого света возбуждаются парасимпатические нервы, что приводит к сужению зрачка. При тусклом свете зрачок… …   Медицинские термины

  • Рефлекс Световой (Light Reflex) — см. Рефлекс зрачковый. Источник: Медицинский словарь …   Медицинские термины

  • pupillary light reflex — pupillary r. (def. 1) …   Medical dictionary

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