Ectropion is a condition where the eyelid turns outwards. This leaves the inner surface of the eyelid exposed and therefore prone to irritation. This condition normally affects older adults, and it generally affects the lower eyelid alone.
Entropion is a condition where your eyelid turns inwards. This means that the eyelashes and skin rub against the surface of the eye which can be uncomfortable and can cause irritation. The eyelid may be turned in permanently or only when blinking hard or when squeezing the eyelids shut.
These conditions commonly happen with ageing due to normal stretching of the tissues that support the lid. There may be other possible causes, though, so the oculoplastic surgeon will need to assess each case to recommend an appropriate way forward. Surgery is often required for ectropion and entropion, it can be done as a day case under local anaesthetic.