Glaucoma is a group of eye conditions that damage the optic nerve, which transmits visual information from the eye to the brain and is essential for good vision. Optic nerve damage often occurs due to sudden high pressure in the eye, or even with normal eye pressure. Glaucoma is also known as the "silent thief of sight" because it often has no symptoms or warning signs until the advanced stages.
Symptoms of glaucoma may include:
Severe eye pain
Nausea and vomiting
Halos or colored rings around lights
Sudden visual disturbances
Redness in the eye
Sudden loss of vision clarity.