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Orthokeratology reshapes eyes to be less prolate and more symmetric
Contact Lens & Anterior Eye ( IF 3.2 ) Pub Date : 2021-11-01 , DOI: 10.1016/j.clae.2021.101532
Yingying Huang 1 , Xue Li 1 , Chenglu Ding 2 , Yunyun Chen 2 , Hao Chen 2 , Jinhua Bao 1
Affiliation  

Purpose

This prospective study assessed the influence of wearing and then discontinuing orthokeratology (OK) lenses on retinal shape and peripheral refraction in myopic children.

Methods

Fifty-eight myopic children (age 8–12 years) were equally divided into an OK group and a single vision spectacles (SVS) group. After 12 months of OK, it was discontinued for 1 month. Peripheral eye length (PEL), relative peripheral refraction (RPR), and corneal parameters were measured in the right eye on the nasal and temporal retinal sides at baseline, 6 months, and 12 months (13 months in OK group) visits.

Results

In the SVS group, faster elongation of the temporal side PEL made the eyes more asymmetric and prolate, developing a temporal pointed shape. In the OK group, the nasal retinal side PEL grew faster, the nasal RPR developed less hyperopic defocus, and the eye shape became more symmetric and less prolate. The central cornea became thinner and flattened, while the peripheral cornea became steeper. Changes in corneal thickness, relative peripheral corneal power, and K-values were no significant differences for the OK and SVS groups at 12 months.

Conclusions

The cornea reverted to be no difference with myopic children with SVS after 1 month discontinuation of OK. The retinal shape of SVS eyes became more asymmetric and prolate with myopia progression. OK remodelled retinal shape to be less asymmetric and less prolate.



中文翻译:

角膜塑形术将眼睛重塑为不那么长且更对称

目的

这项前瞻性研究评估了佩戴然后停用角膜塑形术 (OK) 镜片对近视儿童视网膜形状和周边屈光度的影响。

方法

58 名近视儿童(年龄 8-12 岁)平均分为 OK 组和单视眼镜 (SVS) 组。12个月OK后停产1个月。在基线、6 个月和 12 个月(OK 组为 13 个月)就诊时,测量右眼鼻侧和颞侧视网膜侧的周边眼长 (PEL)、相对周边屈光度 (RPR) 和角膜参数。

结果

在 SVS 组中,颞侧 PEL 的更快伸长使眼睛更加不对称和扁长,形成颞尖形状。在OK组中,鼻视网膜侧PEL增长更快,鼻RPR远视散焦减少,眼形变得更加对称和不那么长。中央角膜变薄变平,而周边角膜变陡。OK 和 SVS 组在 12 个月时角膜厚度、相对周边角膜屈光力和 K 值的变化没有显着差异。

结论

停药1个月后角膜恢复与SVS近视儿童无差异。SVS 眼睛的视网膜形状变得更加不对称并且随着近视的进展而变长。OK 重塑了视网膜形状,使其不对称且扁平。

更新日期:2021-11-01
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