Small extramacular lesions (lesions not threatening vision) may be observed without treatment.

Eventually, weakened blood vessels may overgrow the retina or bleed, threatening vision.

The disease can threaten vision, sometimes causing temporary or permanent blindness.

A few very rare complications may threaten vision, including:

The slight chance of serious complications that threaten vision is enough to keep me from having surgery.

Serious problems that threaten vision are rare.

Posterior vitreous detachment does not directly threaten vision.

Fortunately, most cases, even those that are highly contagious, do not threaten vision or cause anything more serious than temporary discomfort.

With these words, and before the conspirators hid had time to collect themselves, she shut the door again, and vanished like a passing but threatening vision.

If not promptly treated, the condition can scar the cornea and threaten vision.