• Glaucoma is often called the "sneak thief of sight" because it progresses silently, usually without pain, and initially affects peripheral (side) vision. The condition is primarily caused by raised intraocular pressure that gradually damages the optic nerve. Early detection is crucial because vision loss from glaucoma is irreversible.
• People at higher risk include those over 40 years of age, individuals with diabetes, myopia (nearsightedness), mature cataracts, a history of eye trauma, certain retinal diseases, and those with a family history of glaucoma.

We use a modern Australian Medmont computerized perimetry system for visual field testing.

• The patient sits in front of a bowl-shaped instrument called a perimeter.
• While focusing on a central point inside the bowl, small lights flash in different areas.
• Each time the patient sees a flash, they press a response button.
• The computer records whether the patient saw each flash and where it occurred.

After the test, a printout shows any areas where the flashes were not seen—indicating potential vision loss, particularly in the peripheral field, which is a key sign of early glaucoma.