Difference between revisions of Trial lens kit
Dlskidmore (talk | contribs) m →How to test myopia with a trial lens kit: Give links titles, nuke the low quality student video. |
Dlskidmore (talk | contribs) m →How to test Astigmatism: pretty up links |
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== JCC Lens == | == JCC Lens == | ||
The JCC Lens has two cylinders at opposite angles and powers. By holding the lens in different ways over a trial cylinder lens, you can determine if the angle or power of the cylinder lens should be changed. (This is the part of the refraction test where the doctor is happy if both options are equally blurry.) | The JCC Lens has two cylinders at opposite angles and powers. By holding the lens in different ways over a trial cylinder lens, you can determine if the angle or power of the cylinder lens should be changed. (This is the part of the refraction test where the doctor is happy if both options are equally blurry.) | ||
* https://youtu.be/ba4ck7oYauY | * [https://youtu.be/ba4ck7oYauY JCC - Example 1 Emily 2/4] | ||
== Stenopeaic Slit == | == Stenopeaic Slit == | ||
A stenopeaic slit is just an opaque disk with a slit in it. By putting the slit at different angles and taking standard myopic refraction, one can calculate the angle and power cylinder needed. | A stenopeaic slit is just an opaque disk with a slit in it. By putting the slit at different angles and taking standard myopic refraction, one can calculate the angle and power cylinder needed. | ||
* http://www.journalrepository.org/media/journals/OR_23/2018/Feb/Chowdhury822018OR39503.pdf | * [http://www.journalrepository.org/media/journals/OR_23/2018/Feb/Chowdhury822018OR39503.pdf Stenopeaic Slit: A Diagnostic and Refractive Tool] | ||
== JCC vs Stenopeaic == | == JCC vs Stenopeaic == | ||