Difference between revisions of Astigmatism measurement

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''Astigmatism measurements vary a lot by time, lighting, what you've been eating/reading, phase of the moon, etc, etc. If you repeat one within .25 that's actually pretty good O_o.''

Use the astigmatism fan. Best instructions from a quick search are https://www.slideshare.net/SeenaJose2/astigmatic-fan, though that's intended for optos so goes into a lot more detail and technology.

1. Find an astigmatism fan: https://duckduckgo.com/?t=ffab&q=astigmatism+fan&iax=images&ia=images

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5. Then measure distance at which last set of lines starts to blur and convert as well.

6. One of those numbers (the first one?) is your CYL value. In which case the SPH value would be the second number minus the first. You might want to search around for more instructions on using the fan, and confirm that this guide is correct. It might not be, it is based on memory.

6. One of those numbers (the first one?) is your CYL value. In which case the SPH value would be the second number minus the first. '''You might want to search around for more instructions on using the fan, and confirm that this guide is correct. It might not be, it is based on memory.'''

==See Also==

* [[Astigmatism]]

* [[Cylinder]]

* [[Measurement]]

* [https://endmyopia.org/diy-tools-how-to-measure-your-astigmatism-diopters/ EndMyopia Blog - How To Measure Your Astigmatism Diopters]

* [https://endmyopia.org/astigmatism-the-big-guide-summary/ EndMyopia Blog - This article also explains how to measure your astigmatism]

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+''Astigmatism measurements vary a lot by time, lighting, what you've been eating/reading, phase of the moon, etc, etc. If you repeat one within .25 that's actually pretty good O_o.''
 Use the astigmatism fan. Best instructions from a quick search are https://www.slideshare.net/SeenaJose2/astigmatic-fan, though that's intended for optos so goes into a lot more detail and technology.
 . Find an astigmatism fan: https://duckduckgo.com/?t=ffab&q=astigmatism+fan&iax=images&ia=images
@@ Line 11: / Line 12: @@
 . Then measure distance at which last set of lines starts to blur and convert as well.
-. One of those numbers (the first one?) is your CYL value. In which case  the SPH value would be the second number minus the first. You might want to search around for more instructions on using the fan, and confirm that this guide is correct.  It might not be, it is based on memory.
+. One of those numbers (the first one?) is your CYL value. In which case  the SPH value would be the second number minus the first. '''You might want to search around for more instructions on using the fan, and confirm that this guide is correct.  It might not be, it is based on memory.'''
+==See Also==
+* [[Astigmatism]]
+* [[Cylinder]]
+* [[Measurement]]
+* [https://endmyopia.org/diy-tools-how-to-measure-your-astigmatism-diopters/ EndMyopia Blog - How To Measure Your Astigmatism Diopters]
+* [https://endmyopia.org/astigmatism-the-big-guide-summary/ EndMyopia Blog - This article also explains how to measure your astigmatism]