Final answer:
When a technician gets a hard-to-read prescription, it's best to get clarification from the prescriber. The unit used to measure prescriptions for vision correction is called diopters (D). Uncertainties in both the prescription and the manufacture of lenses can affect the accuracy of corrective lenses.
Step-by-step explanation:
When a technician gets a hard-to-read prescription, it's best to get Clarification from the Prescriber.
The unit used to measure prescriptions for vision correction is called diopters (D).
The minimum uncertainty with which corrections in diopters are determined and the accuracy with which corrective lenses can be produced can vary. Uncertainties in the prescription may arise from factors such as handwriting legibility, incomplete information, or errors in measurement. Uncertainties in the manufacture of lenses can result from variations in lens material, production techniques, or the precision of equipment used.