Eye floaters are a composite of the gelatinous substance or cells inside the vitreous of the eye. What people with eye floaters see are the shadows these particles generate on the retina.
They are usually noticed while looking at flat things, such as a plain wall or the sky.
When should you contact an ophthalmologist?
If you notice a sudden increase of eye floaters.
If you notice flashes of light in the eye with floaters.