Critical Visual Symptoms You Should Never Ignore

2. The Sensation of a Dark Curtain or Shadow One of the most urgent emergencies in ophthalmology is the sensation of a dark curtain, veil, or shadow sweeping across your field of vision. This symptom is frequently linked to retinal detachment or a significant tear and is considered a true medical emergency. Experts warn that this "curtain effect" may be accompanied by flashes of light or a sudden drop in visual clarity. In such cases, even a delay of a few hours can result in irreversible consequences for your sight, making immediate professional intervention vital.