Glaucoma often progresses silently, gradually affecting vision before individuals become aware. While intraocular pressure typically ranges from 10-20 mmHg, values exceeding 21 mmHg indicate elevated intraocular pressure, which can damage the optic nerve and increase glaucoma risk. However, elevated intraocular pressure does not always lead to a glaucoma diagnosis; conversely, some individuals develop glaucoma even with normal intraocular pressure.

Glaucoma frequently first manifests as gradual peripheral vision loss. Peripheral vision is the ability to see objects to the sides and around while looking straight ahead. Glaucoma typically damages the peripheral visual field before significantly affecting central vision. Individuals may not notice this change in daily activities, allowing the condition to progress silently for an extended period. According to Times of India, peripheral vision loss may go unnoticed until the disease advances. Visual field tests help doctors assess these changes and detect glaucoma-related damage. As optic nerve damage continues to progress, individuals may experience fixed blind spots within their visual field. Verywell Health notes this can be one of the first signs that elevated intraocular pressure has led to glaucoma.

Blurred vision, especially when sudden and accompanied by pain or redness, can be a warning sign of glaucoma. Illustration: AI

Acute angle-closure glaucoma can cause significant pain or pressure behind the eye. This warrants immediate attention, especially if it appears suddenly or is accompanied by blurred vision. This condition occurs when the eye's drainage pathway becomes blocked, causing a rapid increase in intraocular pressure. This is an urgent situation requiring immediate examination and treatment. Severe eye pain, headache, nausea, or vomiting can accompany acute angle-closure glaucoma. Individuals experiencing pain or pressure behind the eye should be examined promptly to rule out this condition.

While not exclusive to glaucoma, sudden blurred vision, especially with other symptoms, warrants immediate attention. Blurred vision is not a specific symptom of glaucoma and can stem from various other eye conditions. However, if vision suddenly decreases, particularly when accompanied by eye pain or redness, individuals should not monitor themselves at home. Acute angle-closure glaucoma can cause a rapid increase in intraocular pressure and present with distinct symptoms such as eye pain, headache, and blurred vision. This form of glaucoma occurs suddenly and should be considered an emergency.

Seeing colored halos around light sources is another critical sign, particularly during an acute angle-closure attack. Some individuals experiencing such an attack may see rings or colored halos around light sources. This symptom is often more concerning when it appears with eye pain, blurred vision accompanied by headache, nausea, or vomiting. Without timely treatment, this condition can lead to sudden vision loss.

Early detection is crucial, utilizing specific diagnostic tools and understanding risk factors. Visual field tests and optical coherence tomography (OCT) imaging help assess peripheral vision and the optic nerve, thereby aiding in the detection of glaucoma-related changes. The risk of elevated intraocular pressure and glaucoma is higher in certain individuals, such as older adults, those with a family history of the disease, severe nearsightedness, thin corneas, or a history of eye trauma. Since the disease can progress silently, regular eye exams help detect abnormalities before vision damage becomes apparent.

Bao Bao (Compiled)