Abnormal sclera morphology Abnormal scleral thickness 2024-06-30T13:45:17Z Any deviation from the normal height of the sclera, the white part of the eye that forms the tough, fibrous outer layer of the exterior of the eyeball. The sclera forms the outer layer of the ocular globe and serves to stabilize size and shape to the eye. Stability of the globe shape is of utmost importance for the optical system which heavily depends on constant distances between cornea, lens and retina. The thickness of the sclera is a major factor in providing a firm structure to the globe.