 |
Alaska Blind Child Discovery |
|||||
A
cooperative, charitable research project to vision screen every preschool
Alaskan |
||||||
Spectacle Comparison Grading |
||||||
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. |  |
||||
ABCD History |
||||||
Kids Eye Disorders |
||||||
Amblyopia |
||||||
Vision Screening |
||||||
Issues |
||||||
ABCD Clinics |
 |
 |
 |
|||
References |
||||||
Contact ABCD |
||||||
|
|
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 | |||||
|
|
Ellipsoid combined sphero-cylinder | 3-D match | ||||
|
|
.jpeg) |
.jpeg) |
 |
|||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
Excel SpecGRADE ellipsoid | Numbers SpecGRADE ellipsoid | ||||
de-ID data ellipsoid |
"Ellipsoid Spectacle Comparison of ..Autorefractors" Clinical Ophthalmology 15:3637-3648 | |||||
|
|
Ellipsoid "Gap" | |||||
|
|
||||||
 |
|
|
|
|
|
|