Difference between revisions of Guide:Reducing lens complexity
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(Created page with "{{Under_construction}} TODO: this article needs to be expanded for edge cases like already low diopters. ==When to reduce lens complexity== Lens complexity is best redu...") |
(Added the *basics*, needs expansion for sure) |
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==When to reduce lens complexity== | ==When to reduce lens complexity== | ||
[[Lens complexity]] is best reduced before getting into the [low diopters] range. Ideally, both eyes would be equal before -1.5 diopters. (TODO: cite an EM source for this) | [[Lens complexity]] is best reduced before getting into the [[low diopters]] range. Ideally, both eyes would be equal before -1.5 [[diopters]]. (TODO: cite an EM source for this) | ||
==How to reduce lens complexity== | ==How to reduce lens complexity== | ||
Make your first reduction a simple spherical reduction. This will teach you the basics of the [[EndMyopia]] methods. | '''Make your first reduction a simple [[spherical]] reduction. This will teach you the basics of the [[EndMyopia]] methods.''' | ||
There are two types of reductions: | There are two types of reductions: | ||
* <div>A simple reduction is a 0.25 [[diopter]] drop in lense power for both eyes, simultaneously</div> | * <div>A simple reduction is a 0.25 [[diopter]] drop in lense power for both eyes, simultaneously</div> | ||
* <div>An equalizing reduction is a 0.25 [[diopter]] drop in lense power for one eye, the eye with greater correction (more negative)</div> | |||
An equalizing reduction is done to bring the eyes closer to having the same level of correction. | |||
Either type of reduction can be applied to [[spherical]] power or [[cylindrical]] power. | |||
There are three rules for reducing complexity: | |||
# <div>Alternate types of reductions. Simple -> Equalizing -> Simple -> Equalizing...</div> | |||
# <div>Change only spherical or only cylindrical and never both simultaneously</div> | |||
# <div>When equalizing, change both differential lenses and normalized lenses simultaneously to keep the [[focal plane|focal planes]] in sync.</div> | |||
TODO: some concrete examples | |||
==References== | ==References== | ||
Revision as of 16:11, 15 June 2020
 | This article is under construction. Please help develop it, whatever your level of expertise |
TODO: this article needs to be expanded for edge cases like already low diopters.
When to reduce lens complexity
Lens complexity is best reduced before getting into the low diopters range. Ideally, both eyes would be equal before -1.5 diopters. (TODO: cite an EM source for this)
How to reduce lens complexity
Make your first reduction a simple spherical reduction. This will teach you the basics of the EndMyopia methods.
There are two types of reductions:
- A simple reduction is a 0.25 diopter drop in lense power for both eyes, simultaneously
- An equalizing reduction is a 0.25 diopter drop in lense power for one eye, the eye with greater correction (more negative)
An equalizing reduction is done to bring the eyes closer to having the same level of correction.
Either type of reduction can be applied to spherical power or cylindrical power.
There are three rules for reducing complexity:
- Alternate types of reductions. Simple -> Equalizing -> Simple -> Equalizing...
- Change only spherical or only cylindrical and never both simultaneously
- When equalizing, change both differential lenses and normalized lenses simultaneously to keep the focal planes in sync.
TODO: some concrete examples