Difference between revisions of Cylinder
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* [https://www.aclens.com/positive-cyl-converter There are tools that will convert between equivalent prescriptions of plus or negative cylinder] | * [https://www.aclens.com/positive-cyl-converter There are tools that will convert between equivalent prescriptions of plus or negative cylinder] | ||
* [https://www.youtube.com/watch?v=0AyE1BmKUh8 Gemily's video explaining plus vs negative cylinder] | * [https://www.youtube.com/watch?v=0AyE1BmKUh8 Gemily's video explaining plus vs negative cylinder] | ||
==See also== | |||
* [[Astigmatism]] | |||
==References== | ==References== | ||