Entropion (In turning eyelid)
Entropion is a condition in which the eyelid turns inward causing your eyelashes to rub against the eye surface causing discomfort and irritation.
Entropion is much like Ectropion (out turning eyelid) and generally only tends to effect adults of an old age. However, there are cases of development complications when a person is born with an extra fold of skin on the eye lid causing it to turn in.
Other causes of ectropion are:
Scarring from eye injuries or surgery