| scleral spur | A ridge of the sclera at the internal scleral sulcus from which ciliary muscle fibres take origin. Synonym: scleral roll. Vascular spur, partial septum between vessels (arteries and veins) at the level of fusion or branching at acute angle. See: calcar. (05 Mar 2000) |
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| scleral staphyloma | A staphyloma occurring in the area of exit of the vortex veins. Synonym: scleral staphyloma. (05 Mar 2000) |
| scleral sulcus | A slight groove on the external surface of the eyeball indicating the line of union of the sclera and cornea or limbus of cornea. Synonym: sulcus sclerae, sulcus of sclera. (05 Mar 2000) |
| scleral veins | Small veins draining the sclera; they are tributaries to the anterior ciliary veins. Synonym: venae sclerales. (05 Mar 2000) |