Closed-angle glaucoma is a serious eye condition that affects many people worldwide. Often referred to as acute angle-closure glaucoma, it is characterized by an increase in eye pressure due to the blockage of the drainage channels in the eye. This condition can cause severe pain and vision loss if left untreated. Other synonyms for closed-angle glaucoma include narrow-angle glaucoma, angle-closure glaucoma, and chronic angle-closure glaucoma. Symptoms of closed-angle glaucoma include severe eye pain, blurry vision, halos around lights, redness, and nausea. It is essential to seek immediate medical attention if you experience any of these symptoms. Early diagnosis and treatment can help prevent vision loss and other complications associated with this condition.