eye morphology trait sclera morphology trait Any measurable or observable characteristic related to the shape, structure, color or pattern of the fibrous, outer envelope of the eyeball, covering it entirely excepting the segment covered anteriorly by the cornea. Trait.ontology VT:0002698 sclerotic coat morphology trait sclerotica morphology trait tunica albuginea oculi morphology trait tunica sclerotica morphology trait