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Updated: Sep 22, 2026

Blood Collection from the American Horseshoe Crab, Limulus Polyphemus
Published on: October 12, 2008
Abstract:
When a patient with no distance complaints is unable to read with comfort, a shift in the cylinder axes should be among the first things considered. A simple technique for measuring the axes is described, interpretation of the measurements is discussed, and various therapeutic approaches are suggested.
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