What is Ptosis and does it affect vision?

Ptosis is a condition when the eyelid drops down and covers part of the eye. If the eyelid drops far enough to cover some of the pupil then it may affect the peripheral vision. Ptosis can be present at birth or it can develop later in life. If the ptosis is severe in young children it can affect the development of normal vision. In adults ptosis can block vision and be bothersome while reading or driving. Adults and children often try to compensate for the droopy eyelid by using the forehead muscles to help lift the eyelid.