Intraocular Pressure

Excerpt

Intraocular pressure (IOP) or eye pressure is the fluid pressure of the eye. The continual production and outflow of fluids maintain this pressure. Considering that the orbital globe can be seen as a spherical rigid container, the pressure generated inside the eye is determined by external pressure and changes in the volume of the contents within. With regard to volumes, the forces generated in a normal eye are determined mainly by the dynamics of the aqueous humor (AH). Although the vitreous body (the clear gelatinous mass between the retina and the lens) fills a large portion of the posterior part of the eye, this transparent gel tends to have a fixed volume and, therefore, is not typically involved in regulating IOP.