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. 2016 Jan 13;3(1):150424. doi: 10.1098/rsos.150424

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© 2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 7. — The crypt categories. Category 1: no crypts. Category 2: only small crypts centered around the collarette. Category 3: at least 1 large crypt located in fewer than three quadrants of the iris. Category 4: at least three large crypts located in three or more quadrants of the iris. Large crypts are defined as those that extend from the collarette into more than 50% of the ciliary zone. The web application used the scleral and iris boundaries to automatically distinguish between large crypts and small crypts. Examples of crypts are illustrated in the above images. Not all crypts are labelled in each image. Crypts that would be defined as large are bounded in green and crypts that would be defined as small are bounded in yellow.