Black spots or flashing lights.

Those little spots or dots that seem to move when you try to focus on them are called myodesopsias, and they are usually harmless when they appear a little at a time. BUT… if you suddenly see many more than usual, or if they are accompanied by flashes of lightning, they may be a sign of something serious: retinal detachment.

This is an urgent problem: the retina (which is like the screen where we “see” images) detaches from its place, and if it is not treated immediately, you can lose vision in that eye. So if you’d better see an ophthalmologist.

7.