相关实验视频
Updated: Sep 19, 2025
07:06
Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
Published on: March 29, 2022
2.7K
多种细分 失焦 优化眼镜镜片诱导轴长度的快速变化和近视儿童的胸膜厚度的区域变化
Mengfan Yang1, Yumiao Chen1, Yefeng Liu1
1Department of Ophthalmology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China.
概括
单视镜头在儿童中迅速增加了轴长度和减少了胸膜厚度,而DSDO镜头缩短了轴长度和增加了胸膜厚度,为近视控制镜头设计提供了洞察力.
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
- 儿科眼科护理 儿科眼科护理
背景情况:
- 近视是儿童日益严重的公共卫生问题.
- 光学失焦在近视的进展中起作用.
- 了解眼睛的快速变化对于近视管理至关重要.
研究的目的:
- 为了研究近视儿童的轴长度 (AL) 和区域胆道厚度 (ChT) 和胆道血管指数 (CVI) 的快速变化.
- 为了比较多段失焦优化 (DSDO) 眼镜镜片与单视眼镜镜片 (SVL) 在这些参数上的效果.
主要方法:
- 31名儿童 (62只眼睛) 使用DSDO镜头;29名儿童 (58只眼睛) 使用SVL.
- 在30分钟读数之前和之后测量了轴长 (AL),胸腔厚度 (ChT) 和胸腔血管指数 (CVI).
- 在各种眼部区域使用扫描源光学连贯性断层扫描进行了测量.
主要成果:
- 在阅读后,SVL组显示AL增加和ChT下降.
- 在阅读后,DSDO组显示AL降低,ChT增加,因地区而异.
- 胸膜厚度的变化在内环和上部区域更为明显.
结论:
- SVL诱导快速AL延长和ChT减少,而DSDO镜头促进AL缩短和ChT增加.
- 区域间的CHT反应差异 (内部与外部,上部区域) 是显著的.
- 这些发现为控制近视的光学失焦镜头的最佳设计策略提供了信息.
相关概念视频
01:16Focusing of Light in the Eye
3.3K
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...
3.3K
01:28Angle Closure Glaucoma: Treatment
718
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...
718
01:27Open Angle Glaucoma: Treatment
597
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...
597
01:15Depth Perception and Spatial Vision
979
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
979
01:25Glaucoma: Overview
792
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...
792