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Crossed-cylinder test
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Biology
Medicine
Ophthalmology
Refraction examination
2026-10-31
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A
subjective
refraction examination
using equal positive and negative cylindrical
powers
at
perpendicular
axes to compare
choices
of correcting axis or
power
.
Ancestors
(5)
Refraction examination
Ophthalmology
Medicine
Biology
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Past exam of the medicine course of the University of Oxford
/
1867
/
Second examination
/
Surgery and midwifery
/
5
/
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