What eye disorder is indicated by a client experiencing a "flash" of light followed by a "curtain" across their vision?

The indication of a "flash" of light followed by a "curtain" across the vision is consistent with retinal detachment. This occurs when the retina, which is the light-sensitive layer of tissue at the back of the eye, peels away from its underlying layer of support tissue. The flash of light is often described as a sudden occurrence, related to changes in the retina, such as traction or the presence of fluid. The "curtain" effect is a common symptom where a shadow or curtain appears over a portion of the visual field, indicating that part of the retina is no longer functioning properly or has been displaced. Timely recognition and treatment of retinal detachment are crucial, as it can lead to permanent vision loss if not addressed promptly.

Other conditions like cataracts, glaucoma, and macular degeneration present different symptoms and do not encompass the specific experience of flashes and curtain-like vision loss.