What symptom is commonly associated with retinal detachment?

Describing a "curtain" across the field of vision is a classic symptom associated with retinal detachment. This visual disturbance occurs when the retina becomes separated from the underlying support tissue, leading to the perception that a shadow or curtain is obstructing the view. Patients often report this phenomenon as a sudden onset of visual changes, which can signify a serious condition requiring immediate medical attention to prevent permanent vision loss.

The other symptoms listed may occur due to different ocular conditions or factors, but they are not typically indicative of retinal detachment. Thus, recognizing the "curtain" effect is crucial for identifying this urgent eye condition.