Closed angle glaucoma is a medical condition that occurs when the angle between the iris and the cornea becomes narrow or completely closed, leading to increased intraocular pressure. This condition is also known as acute angle-closure glaucoma, narrow-angle glaucoma, or angle-closure glaucoma. Identifying closed angle glaucoma is crucial as patients with this condition can suffer vision loss or blindness. Symptoms of this condition include sudden onset of severe eye pain, headache, blurred vision, seeing halos around lights, and nausea and vomiting. Early intervention, including the use of eye drops, pills, or surgery can help manage the condition. It is important to seek immediate medical attention if any of the symptoms occur.