15mm long, with notches in 5mm increments and single marking tooth at tip; for measuring and marking the distance from the limbus to the location of the muscle reinsertion

The Helveston Scleral Marking Ruler is designed to simplify measuring and marking the sclera for strabismus surgery. The ruler is vaulted to conform to the curvature of the globe and features lines in 1mm increments with a single tooth at the tip to mark the reinsertion site. To attach a muscle 6mm from the limbus you would place the 6mm mark of the ruler on the limbus and indent the sclera with the pointed tip of the ruler to identify the location for the sutures.

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