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A special lens consisting of two cylinders of equal power, one minus and one plus, with their axes set at right angles to each other; used for determining the axis and power of an astigmatic correction.

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The International Joint Commission on Allied Health Personnel in Ophthalmology (IJCAHPO) is an American nonprofit professional association for Allied Ophthalmic Personnel (AOP).


1. A special lens consisting of two cylinders of equal power, one minus and one plus, with their axes set at right angles to each other; used for determining the axis and power of an astigmatic correction.





 
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