Viral meningitis is common and contagious, but it is rarely serious or fatal and does not require antibiotics. The more serious meningococcal bacteria are the leading cause of meningitis in adolescents ages 11 to17, and while theyâre rare, they can be fatal.
Test Overview. A tonometry test measures the pressure inside your eye, which is called intraocular pressure (IOP). This test is used to check for glaucoma, an eye disease that can cause blindness by damaging the nerve in the back of the eye (optic nerve ).
The diagnosis of glaucoma is made when your eye doctor notices a particular type of damage in the optic nerve known as âcupping.â This diagnostic finding can occur with or without high intraocular pressure. A normal intraocular pressure (IOP) ranges between 12 and 22 mmHg (millimeters of mercury, a measurement of pressure).