Difference between revisions of Measurement
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Measurements are a learning process, not a goal | Measurements are a learning process, not a goal | ||
== | == Centimeter Measurement == | ||
The cm measurement uses a basic optics formula to calculate the diopters of correction you need to see clearly long distance. | The cm measurement uses a basic optics formula to calculate the diopters of correction you need to see clearly long distance. | ||
# Hold a ruler up to your eye, and measure how far away you can still read text without [[blur]] in centimeters. This is your "cm measurement". | # Hold a ruler up to your eye, and measure how far away you can still read text without [[blur]] in centimeters. This is your "cm measurement". | ||
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# Calculate diopters from the measurement: [[Diopters]] = -100cm/cm measurement. | # Calculate diopters from the measurement: [[Diopters]] = -100cm/cm measurement. | ||
# If your result is stronger than -4D, and you wear glasses, you'll need to correct for [[vertex distance]] to convert this from contacts diopters to glasses diopters. | # If your result is stronger than -4D, and you wear glasses, you'll need to correct for [[vertex distance]] to convert this from contacts diopters to glasses diopters. | ||
# If your result is stronger than - | # If your result is stronger than -4, you'll likely have problems getting consistent readings since the margin for error is much smaller. For best results: please see: [[Guide:Measuring with differentials]]. | ||
== Trial Refraction == | == Trial Refraction == | ||
If your | If your myopia is high and/or complex, you may need a [[trial lens kit]] to measure your own vision, or you may just stick to professional [[optometrist]] exams. | ||
<youtube>n2ku6gJ3z7E</youtube> | <youtube>n2ku6gJ3z7E</youtube> | ||
== Tools == | == Tools == | ||
* [[EndMyopia Diopter Calculator]] | * [[mainendmyopiasite:focal-calculator/calc.html|EndMyopia Diopter Calculator]] | ||
** [https://endmyopia.org/another-diy-diopter-measuring-tool/ Making the physical measurement easier] (EndMyopia blog link) | ** [https://endmyopia.org/another-diy-diopter-measuring-tool/ Making the physical measurement easier] (EndMyopia blog link) | ||
*[[Varakari's Vision Log Tool]] | *[[Varakari's Vision Log Tool]] | ||
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* [https://testflight.apple.com/join/wuAvRvdL The iOS Sight Meter App] | * [https://testflight.apple.com/join/wuAvRvdL The iOS Sight Meter App] | ||
* [https://play.google.com/store/apps/details?id=org.endmyopia.calc The Android Diopter Calculator] | * [https://play.google.com/store/apps/details?id=org.endmyopia.calc The Android Diopter Calculator] | ||
* [https://courses.endmyopia.org/wp-content/uploads/2024/03/endmyopia-myopia-ruler-letter-size.pdf Printable diopter ruler] (From the blog) | |||
==See Also== | ==See Also== | ||
* [[Astigmatism measurement]] | * [[Astigmatism measurement]] | ||
* [[Guide:How_to_measure_your_eyesight|How_to_measure_your_eyesight]] | |||
* [[Guide: measuring with differentials| Guide to measuring with Differentials for high myopes]] | |||
==References== | ==References== | ||
{{reflist}} | {{reflist}}[https://courses.endmyopia.org/measure/?fbclid=IwAR01yIImN77PO3L1yU0LpTTxfW11uIRSFAbj9KoB53_2KxOP_hrZjoQYYDk Blog post on measurment] | ||
[[Category:Articles]] | [[Category:Articles]] | ||