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Long-term changes in the corneal endothelium after orthokeratology in children Saiko Matsumura 1 , Kazuhiko Dannoue 2 , Keiko Uemura 2 , Tomomi Saga 2 , Maho Tomioka 2 , Yuichi Hori 1 1Department of Ophthalmology, Toho University School of Medicine 2Dannoue Eye Clinic pp.765-772
Published Date 2022/6/15
DOI https://doi.org/10.11477/mf.1410214409
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Abstract Purpose:To evaluate the long-term effects of orthokeratology(OK)on the endothelial cell morphology and axial length(AL)changes in children.

Methods:We retrospectively analyzed 28 eyes of 14 children who underwent OK treatment and were followed up at least 3 years between 2013 to 2019 at the Dannone Eye clinic(20 boys, the mean age 11.93±2.09 years, range 9-15 years). Corneal endothelium was observed using specular microscopy, mean endothelial cell density(ECD), coefficient of variation(CV)of cell areas, and hexagonal cell appearance(%SIX)were compared before and after treatment. In sub-analysis, endothelial cell morphology and AL changes were compared between the two groups that were divided by the age of prescription initiation〔elementary school students(9-12 years)and junior high school students(13-15 years)〕.

Results:The OK treatment period was 4.50±2.11 years(range 3-8 years). ECD decreased significantly from 2,999±209.2 cells/mm2 to 2,853±168.4 cells/mm2(p<0.001)and CV increased from 22.00±2.67 to 23.36±1.80(p<0.01). %SIX showed no difference. The endothelial cell loss rate was 0.33±0.15% per year, which was less than the age-related cell loss previously reported in healthy children(1.1±0.8% per year). AL increased from 24.86±0.52 mm to 25.32±0.61 mm(p<0.001). Sub-analysis demonstrated a significant difference in AL change between the elementary school group(0.16±0.11 mm)and the junior high school group(0.04±0.05 mm)(p<0.001), but revealed no difference in corneal endothelial changes between the two groups.

Conclusion:After an average of 4.5 years of OK treatment for children, corneal endothelial cell morphology changes were suggested to be within the range of physiological changes.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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