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Subjective Refraction Tutorial Jackson Cross Cylinder Technique. Plus cylinder refraction with phoropter. Dr. David Guyton. Source: American Academy of Ophthalmology. Table of Contents: 00:25 Title/Intro 00:54 History 02:28 Subjective Refraction 02:55 Basics of Astigmatism and Cross Cylinder Testing 08:36 Sphere Refraction 13:51 Cross Cylinder ...
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