intraocular pressure

The pressure inside the eyeball is called intraocular pressure for short. It is the equilibrium pressure exerted by the eye contents on the eyeball wall. The IOP of a normal person is stabilized within a certain range to maintain the normal shape of the eyeball and the visual function of the eye. Normal IOP ranges from 1.47 to 2.79 kPa (11 to 21 mmHg). The methods of detecting intraocular pressure include finger tonometer and tonometer measurement. Fingering method allows the patient's eyes to look down naturally. The examiner touches the eyeball with the tips of the two index fingers from above the upper edge of the eyelid. The rest of the fingers are placed on the forehead of the patient for support. To the sense of fluctuation at the fingertips, estimate the level of eye pressure. Generally, Tn is normal, high intraocular pressure is T + 1, 2, 3, and low intraocular pressure is T-1, 2, 3. Tonometer measurement methods are divided into two types: indentation and flattening. Schiotz indentation tonometer is commonly used clinically. It measures the intraocular pressure by indenting the central cornea with a certain weight.