Simple exophthalmos what performance?

Simple exophthalmos generally only some signs of abnormal eye, without obvious symptoms. The main focus is on the levy eyelid muscle contracture so on the eyelid contraction. Normal circumstances completely relaxed eyes stare forward, the veil slightly on the eyelid cornea (the black eye) on the edge. Simple exophthalmos patient's upper eyelid contraction in the Ping as often short of covering up the upper edge of the cornea, therefore, on the lower edge of the eyelids and the upper edge of the cornea exposed between some of the sclera (white eye). On the eyelid muscle contraction may be too high thyroid hormone levels and the sympathetic nervous excitement. As the upper eyelids contracture, down view, on the eyelids drooping behind the eyeball to sag, exposing the sclera will be more evident and As perhaps was not exposed at the sclera, but down view can be exposed when the sclera. Contracture on the eyelids of patients, the eyes appear large and expressive, and there is a feeling of staring. Normal eye exophthalmos degrees (orbital bone lateral margin of the cornea to the forefront of distance) usually does not exceed 16 mm, But myopia of exophthalmos degrees may be slightly larger number. If there is no myopia and exophthalmos was more than 16 mm and are generally regarded as a exophthalmos. Simple exophthalmos exophthalmos was generally not more than 20 mm.