Fig. 2

Retinal image quality calculated from aberration terms over time for the two groups. a 3-mm pupil size; b Natural photopic pupil sizes. Error bars indicating the standard error. AOK, combined 0.01% atropine and orthokeratology; OK, orthokeratology alone; HOA, higher-order aberrations terms (3rd- to 4th-orders inclusive orders); LOA, lower-order aberrations terms (2nd-order); OK HOA, mean visual Strehl ratio derived from HOA only in the OK group (n = 35); OK LOA, mean visual Strehl ratio derived from LOA only in the OK group (n = 35); OK All Terms, mean visual Strehl ratio derived from HOA and LOA combined in the OK group (n = 35); AOK HOA, mean visual Strehl ratio derived from HOA only in the AOK group (n = 33); AOK LOA, mean visual Strehl ratio derived from LOA only in the AOK group (n = 33); AOK All Terms, mean visual Strehl ratio derived from all Zernike terms HOA and LOA combined in the AOK group (n = 33); M, months; *indicating significant difference at all post-treatment visits