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. 2020 Apr;127(4):492–500. doi: 10.1016/j.ophtha.2019.10.037

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© 2019 by the American Academy of OphthalmologyThis is an open access article under the CC BY license (<inter-ref xlink: href=http://creativecommons.org/licenses/by/4.0/>http://creativecommons.org/licenses/by/4.0/</inter-ref>).

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Images showing parameters for quantitative segmentation analysis: (A) central foveal B-scan and (B) en face fundal view. Three metrics were included in the segmentation analysis: (1) outer segment (OS) length, that is, the distance between point I (cone outer segment tips [COST]) and point II (OS); (2) photoreceptor length, that is, the distance between point I and point III (outer nuclear layer [ONL]); and (3) foveal developmental index, that is, the ratio of the distance between point I and point III divided by the distance between point I and point IV (foveal pit).