无眼视和近视控制的正视 - 轴延长和相对外周折射
Jianglan Wang1, Sin Wan Cheung2, Siyu Bian1
1Department of Optometry and Visual Science, West China School of Medicine, Sichuan University, Chengdu, China.
概括
整形眼科 (ortho-k) 治疗减缓了异视眼儿童的轴延长,特别是在较高的近视眼中,减少了整眼的差异. 在正视后,外周折射从超视转变为近视,特别是在鼻腔视野中.
科学领域:
- 眼科和眼镜检查的眼科和眼镜检查
- 近视控制研究近视研究
- 角质重塑技术 角质重塑技术
背景情况:
- 异视近视,眼睛之间有不平等的折射误差,这给近视管理带来了独特的挑战.
- 骨科医疗 (ortho-k) 是一种非手术性折射校正方法,使用一夜穿戴的刚性气体透透镜.
- 了解ortho-k对异视眼儿童的轴延长和外周折射的影响,对于优化治疗策略至关重要.
研究的目的:
- 为了研究骨关节学对双边异眼视的儿童的轴延长 (AE) 和相对外周折射 (RPR) 的影响.
- 为了分析整眼轴长 (AL) 差异的变化,在ortho-k治疗后.
- 探索轴延长和外周折射变化之间的关系,在异眼视障管理的背景下.
主要方法:
- 7-12岁的双边异视眼儿童被录取并使用正视眼镜进行治疗.
- 轴长 (AL) 和相对外周折射 (RPR) 从鼻30°到30°被测量在基线和每6个月2年.
- 随着时间的推移计算和分析了轴延长 (AE),RPR变化和整眼AL差异.
主要成果:
- 在较高近视眼 (HM) 的眼睛中,与较低近视眼 (LM) 的眼睛相比,轴延长显著较小 (0.26 mm与0.50 mm),减少了整眼AL差异.
- орто-k治疗诱导了视野中RPR的近视转移,在HM眼中观察到更大的变化.
- 较慢的轴延长与更近视的RPR转移有关,特别是在鼻视野 (N20°和N30°).
结论:
- орто克拉托疗法有效地减缓了异视眼儿童的轴延长,对更近视眼的影响更大,导致整眼AL不对称性减少.
- орто-k 治疗改变了周围折射,将其转移到近视,在和鼻周围区域有显著变化.
- 这些发现表明,减少轴延长和特定的外周折射变化之间存在联系,突出显示了近视控制与正视治疗中的因素的复杂相互作用.
相关概念视频
01:16Focusing of Light in the Eye
2.7K
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...
2.7K
01:27Open Angle Glaucoma: Treatment
427
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...
427
01:28Angle Closure Glaucoma: Treatment
470
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...
470
01:25Glaucoma: Overview
538
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...
538
01:17Accessory Structures of the Eye
1.5K
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
1.5K