scleral spur


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scleral spur

[TA]
circular ridge of sclera on the internal aspect of the corneoscleral junction; on cross-section, it appears as a hooklike process deep to the scleral venous sinus; relatively rigid, it provides attachment for the meridional fibers of the ciliary body.
Synonym(s): calcar sclerae [TA], scleral roll

scle·ral spur

(skērăl spŭr) [TA]
Circular ridge of sclera on the internal aspect of the corneoscleral junction.
Synonym(s): calcar sclerae [TA] , scleral roll.

scleral spur

Scleral fibers bordered anteriorly by the canal of Schlemm and the trabecular meshwork and posteriorly by the ciliary muscle fibers.
See also: spur

scleral spur 

A ridge of the sclera at the level of the limbus interposed between the posterior portion of Schlemm's canal and the anterior part of the ciliary body. The scleral spur is the structure to which some of the ciliary muscle fibres are attached. See gonioscopy; internal scleral sulcus.
References in periodicals archive ?
Table 1 Shaffer grading interpretation Clinical Shaffer angle Grade Structures visible interpretation 35-45[degrees] 4 Ciliary body Closure impossible at present 25-35[degrees] 3 Scleral spur Closure impossible at present 20[degrees] 2 Pigmented TM Closure possible but unlikely 10[degrees] 1 Non-pigmented TM Closure not inevitable but risk is high 0[degrees] 0 None Closed Table 2 Estimation of AC depth compared to corneal van Herick Foster's modified thickness grading grading >0.
Grade 3 (25-35 degrees): the angle is such that at least the scleral spur can be identified.
It is important for the device to enter the eye exactly at the anterior aspect of the scleral spur and for it to remain at the iris plane so that it does not point downward towards the iris.