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Orthokeratology, also known as corneal reshaping therapy (CRT), is a non-surgical and reversible process of reshaping the cornea using specially designed contact lenses that are worn overnight. The goal of orthokeratology is mostly used to correct myopia (nearsightedness) with or without astigmatism, so that individuals can achieve clear vision without the need for glasses or daytime contact lenses. Orthokeratology lenses work by gently flattening the curvature of the cornea, which changes the way light is focused on the retina.
The effects of orthokeratology typically last for one to two days, so patients need to wear the lenses nightly to maintain the desired vision correction. Orthokeratology is a safe and effective option for many patients, especially those who are not eligible for LASIK surgery or are seeking an alternative to traditional corrective lenses.
Orthokeratology has been found to be effective in slowing down the progression of myopia in children. A significant body of research has demonstrated that orthokeratology lenses reduce the progression of myopia in children by up to 50%. These studies have shown that children who undergo orthokeratology have a slower rate of axial elongation (an increase in the length of the eyeball) than those who wear traditional eyeglasses or daytime contact lenses. Another study conducted by the American Academy of Ophthalmology reviewed 25 randomized clinical trials and found that orthokeratology was effective in slowing down the progression of myopia in children and adolescents.
However, it is important to note that orthokeratology may not be suitable for all children, and there can be risks associated with contact lens wear. It is essential to consult with an eye care professional to determine whether orthokeratology is an appropriate option for a child with myopia.
角膜塑形术 (Orthokeratology, OK镜), 也称为角膜重塑疗法 (corneal reshaping therapy, CRT), 是一种非手术且可逆的重塑角膜的过程, 使用专门设计的隔夜佩戴隐形眼镜. 角膜塑形术的目标是矫正屈光不正, 例如近视和散光, 使个人无需佩戴眼镜或日间隐形眼镜即可获得清晰的视力. 角膜塑形镜片的工作原理是轻轻地压平角膜的曲率, 从而改变光线聚焦在视网膜上的方式. 角膜塑形术的效果通常持续一到两天, 因此患者需要每晚佩戴镜片以保持所需的视力矫正. 对于许多患者来说, 角膜塑形术是一种安全有效的选择, 尤其是那些不符合 LASIK 手术条件或正在寻求替代传统矫正镜片的患者.
角膜塑形术除了可纠正屈光不正, 还已被发现可有效减缓儿童近视的发展. 大量研究表明, 角膜塑形镜可将儿童近视的加深降低多达 50%. 这些研究还表明, 与佩戴传统眼镜或日间隐形眼镜的儿童相比, 接受角膜塑形术的儿童眼轴增长率 (眼球长度增加) 也相继同时减慢. 美国眼科学会进行的另一项研究回顾了 25 项随机临床试验, 也同样发现角膜塑形术可有效减缓儿童和青少年的近视加深. 但需要注意的是角膜塑形术可能并不适合所有儿童, 而且佩戴隐形眼镜可能存在风险. 必须咨询眼科视光师以确定角膜塑形术是否适合就诊的近视儿童.
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