Glaucoma, a leading cause of irreversible blindness globally, often develops slowly and without noticeable symptoms, leading many individuals to remain unaware of the condition until significant vision loss has occurred. The disease encompasses a group of eye disorders characterized by damage to the optic nerve, which transmits visual information from the eye to the brain. This damage is frequently associated with elevated intraocular pressure, or pressure inside the eye.

The most common form of glaucoma progresses gradually, initially affecting peripheral vision, with lost vision typically irreversible. Early detection and treatment are critical to slowing or preventing further vision decline. Risk factors include age over 40, family history of glaucoma, diabetes, high eye pressure, extreme nearsightedness, previous eye injuries, and long-term use of steroids. It is recommended that individuals with a family history notify their relatives, who should also undergo screening.

In its early stages, glaucoma usually causes no symptoms. As the disease advances, affected individuals might experience diminished side vision, blurred vision, difficulty seeing in low light, or frequent changes in eyeglass prescriptions. A less common but more acute form known as angle-closure glaucoma can present suddenly with severe eye pain, redness, blurred vision, halos around lights, headaches, nausea, or vomiting, and requires immediate medical intervention to prevent permanent damage.

Glaucoma diagnosis involves a comprehensive eye examination, including measurement of eye pressure and corneal thickness, detailed assessment of the optic nerve—often with pupil dilation—visual field testing to evaluate peripheral vision, optical coherence tomography (OCT) scans to analyze the optic nerve and nerve fiber layer, and gonioscopy to inspect the eye’s drainage angle. These tests help determine the presence and severity of glaucoma and inform appropriate treatment plans.

Routine eye examinations are advised by age 40, or earlier for those with risk factors, followed by regular monitoring as recommended by an ophthalmologist. Treatment primarily focuses on lowering intraocular pressure to protect the optic nerve and preserve remaining vision. Initial therapy often involves prescription eye drops, with laser procedures and surgery considered if medication proves insufficient. Successful management typically requires lifelong care, patient adherence to prescribed treatments, and consistent medical follow-up. Additionally, controlling underlying conditions such as diabetes and hypertension contributes to better outcomes.

Specialized eye care services, including integrated clinics that coordinate efforts among internal medicine specialists, ophthalmologists, and neurologists, ensure comprehensive management of patients, particularly those with diabetes. Experts emphasize that because early glaucoma produces no perceptible symptoms, proactive screening through simple eye exams is vital to safeguarding vision.