June 2017
Volume 58, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2017

The influence of orthokeratology on blur detection threshold and accommodation in myopic children.
Author Affiliations & Notes
  • chunwen tao
    School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
    WEIRC,Wenzhou Medical University-Essilor International Research Center, Wenzhou, China
  • Jingjing Xu
    School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
    WEIRC,Wenzhou Medical University-Essilor International Research Center, Wenzhou, China
  • Xin lu
    Ningbo Medical Center Lihuili Hospital, Ningbo, Zhejiang, China
  • Jinhua Bao
    School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
    WEIRC,Wenzhou Medical University-Essilor International Research Center, Wenzhou, China
  • Bjorn Drobe
    R&D Optics AMERA, Essilor International, Singapore, Singapore
    WEIRC,Wenzhou Medical University-Essilor International Research Center, Wenzhou, China
  • Hao Chen
    School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
    WEIRC,Wenzhou Medical University-Essilor International Research Center, Wenzhou, China
  • Footnotes
    Commercial Relationships   chunwen tao, Essilor International (F); Jingjing Xu, Essilor International (F); Xin lu, Essilor International (F); Jinhua Bao, Essilor International (F); Bjorn Drobe, Essilor International (E); Hao Chen, Essilor International (F)
  • Footnotes
    Support  International S&T Cooperation Program of China, Grant No. 2014DFA30940
Investigative Ophthalmology & Visual Science June 2017, Vol.58, 5425. doi:
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      chunwen tao, Jingjing Xu, Xin lu, Jinhua Bao, Bjorn Drobe, Hao Chen;
      The influence of orthokeratology on blur detection threshold and accommodation in myopic children.. Invest. Ophthalmol. Vis. Sci. 2017;58(8):5425.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose :
To evaluate the variation of blur detection thresholds (BDT) and the lag of accommodation before and after wearing orthokeratology lenses in myopic children.

Methods : Twenty-two myopic children of 8-14 years old (spherical equivalent:-1.00D to -5.75D with astigmatism ≤0.75 D, best-corrected visual acuity ≥20/20), corrected with orthokeratology lenses, participated in this self-controlled prospective study. Their visual acuity after orthokeratology correction was not less than 20/20. The subjects’ blur detection threshold, accommodative lag, and higher-order aberrations were measured before and after one-month wearing orthokeratology lenses. All the data were analyzed with SPSS 19.0 software.

Results : Higher-order aberrations increased significantly (t=-9.166, P<0.05) after orthokeratology correction, with higher trefoil (t=-2.716,P<0.05) and higher coma (t=-4.464, P<0.05). The BDT decreased significantly after orthokeratology correction by 0.08D (t=2.527,P<0.05). No significant change in the accommodative lag was found after wearing orthokeratology lenses (before 0.39±0.42D, after 0.19 ±0.38 D; t=1.862,P>0.05) . There was no significant correlation between blur detection threshold and accommodative lag either before (r=-0.364. P>0.05) or after (r=0.097, P>0.05)orthokeratology correction. Similarly, no correlations between BDT and higher-order aberrations were found.

Conclusions : After orthokeratology correction, the blur sensitivity of myopic children improved while their accommodative behavior remained unchanged.

This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.

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