English to Greek Medical Medical: Instruments ophthalmology

Most people, particularly if they are short sighted, have some ***floaters*** inside their eyes. These appear as little black spots or 'flies' which appear to float around in front of your sight. They move when you move your eyes and are normally more obvious when you are looking at a plain pale background (like a cloudless sky). They are normally quite innocent, but if you get a shower of ***floaters***, if you see lots of floaters after you have banged your head, or if you see flashing lights in your eyes or a 'curtain' or 'veil' in front of your eyes you should seek urgent medical attention.