* after age 65, every six to 12 months Anyone with high risk factors should be tested every year or two after age 35.
1. Retinal nerve fibre layer thickness(optical coherence tomography) : This machine measures the thickness of the retinal nerve fibers; glaucoma causes death of the nerve fibers . This instrument is useful for early detection of damage and change over a period of time.
2. Heidelberg retinal tomography (HRT) : this device documents the optic nerve and retinal nerve fiber layer and it can also be used to detect progression of the disease. It is a non-contact, rapid test.
This device scans the front part of the eye involved in drainage of fluid ; it is an alternative to gonioscopy in case of hazy cornea, preventing its direct visualization.
Diagnosing glaucoma is not always easy, and careful evaluation of the optic nerve continues to be essential to diagnosis and treatment. The most important concern is protecting your sight. Doctors look at many factors before making decisions about your treatment.