While most floaters are harmless, some changes may point to a serious eye condition. You should see a doctor if you notice:
A sudden increase in floaters
Flashes of light in your vision
A dark shadow or curtain blocking part of your sight
These could signal retinal detachment or other urgent eye issues.
You’re more at risk if you:
Are over 50
Are nearsighted
Have had eye surgery or injury
Have diabetic eye problems or inflammation
“Most floaters are harmless,” the article notes, but don’t ignore new or sudden changes. It’s best to get your eyes checked right away.