Intraocular pressure

Intraocular pressure (synonym ophthalmotonus) - the pressure that the contents of the eyes on the wall of the eyeball. The value of intraocular pressure depends mainly on the number of intraocular fluid (blood vessels in the eye and watery moisture - see Eye), as the capacity of the eye, depending on the elasticity of the sclera, practically does not change.
Normal intraocular pressure in different people varies from 18 to 27 mm RT. century and is characterised by stability. Fluctuations during the day do not exceed 3-5 mm RT. century: in the morning intraocular pressure is slightly higher than in the evening. This continuity of intraocular pressure is necessary for normal functioning of the internal membranes of eyes, especially the retina, and is determined by a number of physiological mechanisms regulating the degree of blood vessels inside the eye, the inflow and outflow watery moisture. Violation of one of these mechanisms may lead to a change in the value of intraocular pressure - anxiety (see Glaucoma) or decrease. Last observed in the number of pathological processes in the eye, leading to the violation of his innervation or power, for example when iridotsiklite (see), retinal detachment (see).
Determined intraocular pressure by palpation (approximately) or using the sphygmomanometer (see ocular Tonometry).