相关实验视频
Updated: Jul 13, 2025

06:09
Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition
Published on: August 18, 2023
1.6K
视神经头部异常在非病理高近视和与视野的关系中的异常
Jingwen Jiang1, Yunhe Song1, Kangjie Kong1
1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, China.
Asia-Pacific journal of ophthalmology (Philadelphia, Pa.)
|October 18, 2023
概括
视神经头部 (ONH) 异常常见于非病理性高近视,90%以上的眼睛显示变化. 这些ONH发现与视野缺陷相关,有助于区分青光眼.
科学领域:
- 眼科医生 眼科 眼科
- 医疗成像医学成像
- 视网膜疾病 视网膜疾病
背景情况:
- 高近视是各种眼部病理的重要危险因素.
- 视神经头部 (ONH) 结构可以在近视症中发生变化,可能模仿玻璃眼病变化.
- 了解非病理性高近视的ONH异常对于准确诊断至关重要.
研究的目的:
- 用扫描源光学连贯断层扫描 (OCT) 来表征非病理性高度近视眼中的ONH异常.
- 调查已识别的ONH异常与视野 (VF) 缺陷之间的关系.
- 为区分近视ONH变化与绿眼病等病理状况提供基础.
主要方法:
- 一个纵向队列研究的二次分析.
- 包括高度近视的患者没有显著的近视性黄斑病变.
- 扫描来源的ONH的OCT成像,分类为3种主要类型和12种亚型的异常.
- 分析患病率,特征和与VF缺陷的相关性.
主要成果:
- 在1389个眼睛中,91.86%的眼睛至少有一种ONH异常.
- 特定的异常,如周状的超反射性卵状质量状结构和可见的后巴下椎空间是常见的.
- VF缺陷与异常相关,例如周囊视网膜脱落和视网膜分裂.
- 类似于玻璃眼的VF缺陷与深光杯和光盘洞/洞状变化有关.
结论:
- 非病理性高近视经常呈现出明显的ONH结构异常.
- 这些OCT定义的ONH变化与特定的视野模式有关.
- 这些发现有助于区分近视ONH变化与病理近视或青光眼的变化.
相关概念视频
Glaucoma: 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
Focusing 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
Anatomy of the Eyeball
7.2K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
7.2K
Photoreceptors and Visual Pathways
6.1K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.1K
Open 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
Angle 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

