What symptoms may indicate that a patient is experiencing closed angle (acute) glaucoma?

Closed angle (acute) glaucoma is characterized by a sudden increase in intraocular pressure due to the blockage of aqueous humor outflow. The symptoms that indicate a patient is experiencing this condition typically include blurred vision, halos around lights, and a fixed, mid-dilated pupil.

Blurred vision occurs as a result of the rapid rise in pressure in the eye, which impacts the eye's ability to focus. Halos around lights are a common visual disturbance due to corneal edema, which can occur when fluid builds up in the cornea as a result of the increased pressure. A fixed pupil is often a critical sign of acute glaucoma, indicating that the iris is not responding properly due to the high pressure in the eye, which can be a severe and urgent situation requiring immediate medical attention.

The other symptoms listed in the other options, while they may be associated with different ocular conditions, do not specifically indicate closed angle glaucoma. Itching and redness typically relate to allergic reactions or conjunctivitis rather than the acute pressure changes seen in glaucoma. Eye fatigue and dryness are more common in conditions like dry eye syndrome or prolonged screen use. Severe headache and photophobia could suggest other issues such as migraine or meningitis but do not pinpoint closed angle glaucoma specifically, which