https://wiki.endmyopia.org/api.php?action=feedcontributions&feedformat=atom&user=Cyrusthegreat 2026-05-04T01:24:56Z User contributions MediaWiki 1.39.3 https://wiki.endmyopia.org/index.php?title=Diopters&diff=1403 2020-05-22T12:08:14Z

<p>Cyrusthegreat: </p> <hr /> <div>Diopters is a measure of the power of a [[lens]] (or mirror). It is equal to 1/[[focal length]] in meters. In EM we refer to the [[cm measurement]] to calculate diopters needed to correct [[refraction]] of the eye. If you can see 50cm clearly your diopters will be 1/0.5=2 diopters.<br /> <br /> Diopters are cancels each other. If you're wearing -2 diopter contacts adjusted for glasses strength and put +1 diopter reading glasses over the contacts you're in effect wearing -1 diopters.<br /> A lens with a negative diopter sign compensates for [[nearsightedness]] while a lens with a positive diopter sign compensates for [[farsightedness]]<br /> <br /> Approximate categorizations of myopia by lens power:<br /> <br /> 0.00 - -0.75 - Probably don't need glasses<br /> <br /> -1.00 - -2.00 - Mild myopia, no [[differentials]] needed<br /> <br /> -2.00 - -5.00 - Moderate myopia, glasses always needed<br /> <br /> -5.00 - -10.00 - High myopia<br /> <br /> -10.00+ - Very high myopia. Field of view significantly reduced.</div>

Cyrusthegreat https://wiki.endmyopia.org/index.php?title=Diopters&diff=1395 2020-05-22T12:04:42Z

<p>Cyrusthegreat: </p> <hr /> <div>Diopters is a measure of the power of a [[lens]] (or mirror). It is equal to 1/[[focal length]] in meters. In EM we refer to the [[cm measurement]] to calculate diopters needed to correct [[refraction]] of the eye.<br /> <br /> A lens with a negative diopter sign compensates for [[nearsightedness]] while a lens with a positive diopter sign compensates for [[farsightedness]]<br /> <br /> Approximate categorizations of myopia by lens power:<br /> <br /> 0.00 - -0.75 - Probably don't need glasses<br /> <br /> -1.00 - -2.00 - Mild myopia, no [[differentials]] needed<br /> <br /> -2.00 - -5.00 - Moderate myopia, glasses always needed<br /> <br /> -5.00 - -10.00 - High myopia<br /> <br /> -10.00+ - Very high myopia. Field of view significantly reduced.<br /> <br /> Diopters are calculated by the formula D=1/f where f is the distance in meter to blur.<br /> <br /> If you can see 50cm clearly your diopters will be 1/0.5=2 diopters.</div>

Cyrusthegreat