iris - muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye aperture - a natural opening in something 3. pupil - a young person attending school (up through senior high school) school...
artificial pupil1.Pupil made by iridectomy.2.A circular aperture made in a diaphragm which can be mounted in front of the eye to provide a constant and smaller pupil size. It is used in research but also as a clinical test.Seepinhole disc. ...
A large pupil that is completely unresponsive to light is called a "fixed" dilated pupil. Dilated pupils aren't the same asanisocoria, a common condition where both pupils react normally to light but differ in size by about a half-millimeter or more. Anisocoria is benign and affects about 2...
An evaluation of pupil size standards used by police officers for detecting drug impairment. Richman JE,McAndrew KG,Decker D,Mullaney SC. Optometry . 2004Richman JE,McAndrew KG,Decker D,Mullaney SC. An evaluation of pupil size standards used by police officers for detecting drug impair...
摘要: In an experiment using ten subjects, marijuana produced a dose-related constriction of the pupil at low photopic light levels; alcohol produced no effect on pupil size. The two drugs in combination produced no change in pupil size.
Therefore this study investigated whether it is possible to state the relationship between pupil size and entrance pupil centre by locating the centre of the pupil. To find the amount of pupil centre shift with respect to the corneal geometric centre for each eye, we: (1) calculated pupillary...
Define Pupil constriction. Pupil constriction synonyms, Pupil constriction pronunciation, Pupil constriction translation, English dictionary definition of Pupil constriction. Noun 1. pupillary reflex - reflex contraction of the sphincter muscle of the ir
Use of the gel achieved greater mydriasis than drops (P = 0.01), and was also associated with lower pain scores (P = 0.003). In diabetic patients, pupil size was smaller at baseline and following instillation of drops and gel. Use of the gel achieved an even greater degree of pupil ...
In the second part of the experiment, the perception task was performed while viewing the patterns through an artificial “pupil” of adjustable size. Although this method allowed for systematic control of the amount of light stimulating the pupil, it is difficult to generalize these results to a...
The size of the pupil, which can vary from about 2 to 8 mm in diameter, is regulated by the autonomic nervous system so as to tend to hold constant the intensity of light admitted to the retina. However, the pupil is also reactive to psychological stimulation with small (<1 mm), but...