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.
The medical term for eye freckles is choroidal nevi. The retina is situated on a membrane called choroid. This membrane consists of colors or pigment cells which are responsible for giving our eyes its natural color. When these pigment cells clustered up together, the freckle or choroidal nevus is formed.