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Part 05 - A Prior Prescription Exists, Test One Eye
Begin by testing the right eye. Complete this process fully before moving on to the left eye.
Follow these steps:
1. Refer to the patient's prescription.
2. Insert the corresponding sphere lens into the rear position of the trial
frame.
3. Insert the appropriate cylinder lens into the front position of the frame.
4. Carefully align the axis of the cylinder lens as indicated in the prescription.
Proceed to Part 06 - Refining the sphere and Astigmatism