What does it mean when SPH is written in the CYL box for my glasses presecriptio!
Question: What does it mean when SPH is written in the CYL box for my glasses presecription!?
Answers:
It means there is no correction for astigmatism in the prescription!.Www@Answer-Health@Com
It's there to indicate that the first number, which *is* the sphere, is the only number in the Rx!.
It's a failsafe, making it clear that no further numbers (cyl, axis,) are missing due to copy error or oversight!.Www@Answer-Health@Com
It's a failsafe, making it clear that no further numbers (cyl, axis,) are missing due to copy error or oversight!.Www@Answer-Health@Com