gout is a form of arthritis an inflammation of the joints that causes sudden severe attacks of pain tenderness redness warmth and swelling in some joints it usually affects one joint at a time although it can be in several joints at once
Entropion can also create secondary pain of the eye (leading to self trauma, scarring of the eyelid, or nerve damage). The upper or lower eyelid can be involved, and one or both eyes may be affected.When entropion occurs in both eyes, this is known as bilateral entropion..ntropion can also create secondary pain of the eye (leading to self trauma, scarring of the eyelid, or nerve damage). The upper or lower eyelid can be involved, and one or both eyes may be affected.
The nictitating membrane of a masked lapwing as it closes. The nictitating membrane (from Latin nictare, to blink) is a transparent or translucent third eyelid present in some animals that can be drawn across the eye for protection and to moisten it while maintaining visibility.he cherry eye is due to a gland called the gland of the third eyelid (nictitans gland), which prolapses. This gland helps to produce up to 50% of the tear film in certain animals. Another gland, called Harder's gland, is present in other animals.