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This muscle hook is made of stainless steel and has a thin, flat blade, which is 10 mm. long. It has small, fine millimeter markings, with a special heavy marking at the 5 mm. point. The blade is designed at right angles to the handle; and the tip of the handle has a sharp, small scleral marker, which can be used in muscle surgery as a marking device.
The instrument has the following features: 1. The thin, narrow blade permits ease in manipulation. 2. Millimeter markings aid in quick estimation of the width and thickness of the muscle and in rapid appraisal of the various measurements which are used in ocular surgery, especially muscle surgery. 3. The scleral marker at the tip eliminates the need for an extra instrument and facilitates the operative procedure. 4. The blade is long enough to allow the tendon of the muscle to be gently
ROLF DE. MUSCLE HOOK. Arch Ophthalmol. 1950;43(3):554. doi:10.1001/archopht.1950.00910010563017