This video takes you through the subjective refraction technique of using the fan and block test to determine a patient’s astigmatism and would be used after retinoscopy. This is an alternative to the Jackson Cross Cylinder technique.
This video takes you through the subjective refraction technique of using the fan and block test to determine a patient’s astigmatism and would be used after retinoscopy. This is an alternative to the Jackson Cross Cylinder technique.
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