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Purpose <p>To determine how accommodation affects lens shape in myopic and non-myopic children.</p> Methods <p>Participants included 76 non-myopic (spherical equivalent refraction (SER): 0.00 to +1.75 D) and 18 myopic children (SER = −3.50 to −0.75 D) aged 5−12 years. Anterior and posterior lens surface shapes were determined by image processing and ray tracing of IOLMaster 700-generated B-scan images (six meridians per scan) at 0, 3, 6 and 9 D accommodation demands, expressed as refractive power vectors (<i>M, J</i><sub>0</sub> and <i>J</i><sub>45</sub>).</p> Results <p>For all children, anterior and posterior lens surface <i>M</i> and total lens power increased by means (±SD) of +0.45 ± 0.17, +0.23 ± 0.20 and +0.65 ± 0.32 D per dioptre of accommodation demand, respectively, with a shift towards a more equiconvex shape with increasing accommodation. <i>J</i><sub>0</sub> and <i>J</i><sub>45</sub> did not change significantly during accommodation (for anterior surface, <i>p</i> = 0.68 and 0.48, respectively; for posterior surface, <i>p</i> = 0.47 and 0.88, respectively). Myopic lenses had significantly lower anterior and posterior surface <i>M</i> and total lens power than non-myopic lenses (<i>p</i> &lt; 0.05), but no significant differences were observed in astigmatic vectors except for anterior lens surface <i>J</i><sub>0</sub>. There were no interactions between accommodation demand and refractive error for any lens parameters (all <i>p</i> ≥ 0.13).</p> Conclusion <p>Myopic children have flatter lens surfaces than non-myopic children. Lens surface shape changes with accommodation are similar between myopic and non-myopic children.</p>

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Crystalline Lens Shape During Accommodation in Children

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月17日

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  • Asik Pradhan,
  • Rohan P. J. Hughes,
  • Emily C. Woodman-Pieterse,
  • Stephen J. Vincent,
  • Scott A. Read,
  • David A. Atchison,
  • Andrew Carkeet

摘要

Purpose

To determine how accommodation affects lens shape in myopic and non-myopic children.

Methods

Participants included 76 non-myopic (spherical equivalent refraction (SER): 0.00 to +1.75 D) and 18 myopic children (SER = −3.50 to −0.75 D) aged 5−12 years. Anterior and posterior lens surface shapes were determined by image processing and ray tracing of IOLMaster 700-generated B-scan images (six meridians per scan) at 0, 3, 6 and 9 D accommodation demands, expressed as refractive power vectors (M, J0 and J45).

Results

For all children, anterior and posterior lens surface M and total lens power increased by means (±SD) of +0.45 ± 0.17, +0.23 ± 0.20 and +0.65 ± 0.32 D per dioptre of accommodation demand, respectively, with a shift towards a more equiconvex shape with increasing accommodation. J0 and J45 did not change significantly during accommodation (for anterior surface, p = 0.68 and 0.48, respectively; for posterior surface, p = 0.47 and 0.88, respectively). Myopic lenses had significantly lower anterior and posterior surface M and total lens power than non-myopic lenses (p < 0.05), but no significant differences were observed in astigmatic vectors except for anterior lens surface J0. There were no interactions between accommodation demand and refractive error for any lens parameters (all p ≥ 0.13).

Conclusion

Myopic children have flatter lens surfaces than non-myopic children. Lens surface shape changes with accommodation are similar between myopic and non-myopic children.