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Alaska Blind Child Discovery |
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A
cooperative, charitable research project to vision screen every preschool
Alaskan |
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Spectacle Comparison Grading |
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Home |
ABCD has developed a way that two different spectacle refractions can be compared. A 20/20 correctable person can see at least 20/25 with an A-grade match, 20/40 with a B-grade match and 20/80 with a C-grade sphero-cylinder match. |  |
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ABCD History |
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Kids Eye Disorders |
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Amblyopia |
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Vision Screening |
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Issues |
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ABCD Clinics |
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References |
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Contact ABCD |
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EXCEL spec grade | astigmatism/sphere | Numbers spec grade | 2-D match | ||
de-Id data |
Beveridge, et al, Grading Spectacle Similarity, Clinical Optometry 13:3-32 | |||||
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Ellipsoid combined sphero-cylinder | 3-D match | ||||
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Excel SpecGRADE ellipsoid | Numbers SpecGRADE ellipsoid | ||||
de-ID data ellipsoid |
"Ellipsoid Spectacle Comparison of ..Autorefractors" Clinical Ophthalmology 15:3637-3648 | |||||
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