ABCD: A new classification for keratoconus.

Indian J Ophthalmol · 2020 · PMC7856970 · PMID 33229658

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highly significantno p-value reported

3 , where highly significant change (progression) can be seen on the posterior corneal surface (”B” parameter) in spite of a stable anterior surface (”A” parameter) and a stable Kmax (circled in blue).

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