近视控制和角膜折射变化的数量之间的关系在orthokeratology透镜治疗后
Lu Sun1,2, Hong-Xin Song3, Zheng-Xuan Li2
1Beijing Aier-Intech Eye Hospital, Beijing, 100021, China.
BMC ophthalmology
|October 31, 2023
概括
在儿童中,正视镜 (Ortho-K) 镜片的佩戴与轴长度 (AL) 增长的减少有关. 控制AL延长似乎与角膜折射变化 (CRC) 区域的面积和体积有关.
科学领域:
- 眼科医生 眼科 眼科
- 视光学测量 视光学测量 视光学测量
- 角膜折射手术 角膜折射手术
背景情况:
- 整形眼镜 (Ortho-K) 镜片用于纠正折射误差.
- 了解角膜变化和轴长度 (AL) 增长之间的关系对于近视管理至关重要.
研究的目的:
- 为了研究由Ortho-K镜头诱导的角膜折射变化 (CRC) 的程度与儿童随后的轴长度 (AL) 增长之间的关联.
- 为了确定CRC的特定参数是否与Ortho-K在控制AL延长中的有效性相关.
主要方法:
- 对77名儿童 (8-14岁) 进行了回顾性分析,他们使用了Ortho-K超过12个月.
- 角膜拓数据 (CRC的面积,高度,体积) 和AL测量在基线和随访期间收集.
- 多变量线性回归分析了CRC参数,AL延长和球体等价值 (SE) 之间的关系.
主要成果:
- 在3个月内,Ortho-K磨损导致CRC高度,面积和体积发生显著变化.
- 在Ortho-K磨损1年后,观察到AL延长的统计显著减少 (P <0.05).
- 一年后,AL延长与CRC区域的面积和体积有负相关性,这表明较大的CRC尺寸与较少的AL增长有关.
结论:
- 在控制轴长度延长方面,Ortho-K镜片的有效性可能与角膜折射变化 (CRC) 区域的诱导变化有关.
- 具体的CRC参数,即其面积和体积,是Ortho-K在近视控制中的有效性的潜在指标.
相关概念视频
01:16Focusing of Light in the Eye
2.9K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
2.9K
01:27Open Angle Glaucoma: Treatment
459
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
459
01:28Angle Closure Glaucoma: Treatment
536
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
536
01:25Glaucoma: Overview
599
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
599