Difference between revisions of Writing:Very High Myopia
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→How to do EM with very high myopia
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=How to do EM with very high myopia= | =How to do EM with very high myopia= | ||
Your best starting place is your professional refraction. The vertex distance issue is still an issue for them, but you should get a more consistent result from the professionals. Before ordering your first [[differentials]] remember to account for vertex distance. Change the vertex distance from 13 to 0 mm, then do your power reduction, then take that value and convert back to the 13mm vertex distance. | Your best starting place is your professional refraction. The vertex distance issue is still an issue for them, but you should get a more consistent result from the professionals. Before ordering your first [[differentials]] remember to account for vertex distance. Change the vertex distance from 13 to 0 mm, (or if you're lucky the starting vertex distance will be on your prescription) then do your power reduction, then take that value and convert back to the 13mm vertex distance (or if you're lucky you already have a pair of the same frames and can measure the actual vertex distance on your face.) | ||
Because pupil height is a bigger issue for stronger lenses, you may need to adjust your glasses to get a better fit. Find the [[optical center]] of your lens. You may be able to adjust the optical center through adjusting built in nose pads or adding adhesive nose pads, or changing where they sit on your face. If you can’t correct this, you should try ordering the same lenses in a different frame. Once you find frames you can adjust correctly, stick with those frames for future purchases. You’ll not only make it easier to fine tune the optical center, but the unintentional cylinder will be more consistent between pairs and cause fewer issues with switching. | Because pupil height is a bigger issue for stronger lenses, you may need to adjust your glasses to get a better fit. Find the [[optical center]] of your lens. You may be able to adjust the optical center through adjusting built in nose pads or adding adhesive nose pads, or changing where they sit on your face. If you can’t correct this, you should try ordering the same lenses in a different frame. Once you find frames you can adjust correctly, stick with those frames for future purchases. You’ll not only make it easier to fine tune the optical center, but the unintentional cylinder will be more consistent between pairs and cause fewer issues with switching. | ||