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Certified Paraoptometric Technician Review Course CPOT - Idaho ...

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Optical CrossTo take an RX off the Optical Cross in Minus Cylinder Form:Start with the most plus sphere power (use your number line)Your axis is “married” to your sphereYour cylinder is the distance traveled between the sphere and number90 degrees away-4.50-2.50-1.25090+1.50121180These are twodifferent lenses031

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