What are flashes and floaters?
Flashes and floaters are images that we ‘see’ when changes inside our eyes stimulate the retina. Signals are sent to our brain and we believe that we are seeing something in our field of vision. Flashes occur when the retina is pushed or pulled, usually by movement of the vitreous gel inside our eye. Floaters are the shadows cast by areas of different clarity in the vitreous.
Want to know more?
This is an excellent YouTube video about flashes and floaters.