Excess, baggy skin of the upper eyelid is called dermatochalasis. Skin can lose its elasticity with age, causing the upper eyelid skin to sag. In some cases, it may create vision problems by obstructing peripheral vision. Surgery to remove this excess skin is called blepharoplasty, and can be performed for cosmetic purposes or vision (medical) purposes.
Ectropion is the term for a lower eyelid that droops away from the surface of the eye. The most common cause of ectropion is age-related changes of the skin. When the lower eyelid sags, there is not adequate tear coverage of the eye and the surface easily dries out. Patients may experience dryness, irritation, redness, excess watering, or foreign body sensation. Surgery can be done to correct the eyelid position.
Entropion is the term for a lower eyelid that rotates in towards the surface of the eye. The most common cause of ectropion is related to age, but it may also develop from previous surgeries around the eyelid, scarring, or spasms of the eyelid muscles. When entropion occurs, patients may experience irritation, redness, scratching due to eyelashes rubbing on the eye, and excess watering of the eye. Surgery can be performed to correct the eyelid position.