Symptoms depend on which muscles are affected. For example, when weakness affects muscles of the chest, people may have difficulty breathing. When weakness affects muscles that control the eyes, people may have double vision. Complete muscle weakness causes paralysis.
The choroid is the layer of blood vessels and connective tissue between the sclera (white of the eye) and retina. It is part of the uvea and supplies nutrients to the inner parts of the eye.
Sclera-is the white part of the eye, it contains elastic fibres. It is located on the outer layer of the eye it protects the eye from getting damaged by dust. Choroid-is made of many blood vessels which is known as the blood vessel of the eye, it is located between the retina and the sclera.It provides oxygen to the outer layers of the retina. Retina-is important to the eye as it is a sensitive tissue which is located in the inner surface of the eye.clera-is the white part of the eye, it contains elastic fibres. It is located on the outer layer of the eye it protects the eye from getting damaged by dust. Choroid-is made of many blood vessels which is known as the blood vessel of the eye, it is located between the retina and the sclera.