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相关概念视频

Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

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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...
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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...
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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.
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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...
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相关实验视频

Updated: Jul 14, 2025

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
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慢性闭角玻璃眼中状体的大小

Jost B Jonas1,2,3, Rahul A Jonas4, Shefali B Jonas5

  • 1Department of Ophthalmology, Medical Faculty Mannheim, University Heidelberg, Kutzerufer 1, 68167, Mannheim, Germany. Jost.Jonas@medma.uni-heidelberg.de.

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|October 7, 2023
PubMed
概括

纤毛体流层 (CBS) 在闭合前腔角的眼睛中明显较小,而与开放角的眼睛相比. 这种CBS的尺寸差异可能会影响水性幽默的外流通路.

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科学领域:

  • 眼科医生 眼科 眼科
  • 人体解剖学 解剖学 解剖学
  • 历史形态测量 历史形态测量 历史形态测量

背景情况:

  • 前腔角的形态影响眼内压力和眼睛的健康.
  • 了解体流体 (CBS) 尺寸与前腔角形态的关系,对于诊断和管理各种眼部疾病至关重要.

研究的目的:

  • 为了研究体流层 (CBS) 的大小与人类眼睛前腔角形态之间的关系.
  • 为了确定CBS尺寸是否在前腔室角度开放和关闭的眼睛之间有所不同.

主要方法:

  • 对107个无核的人类眼睛进行了基质形态测量分析.
  • 眼睛被分为开放的前腔角 (68只眼睛) 和封闭的,内皮化前腔角 (39只眼睛) 的眼睛.
  • 测量最大和最小的CBS宽度,以及最大的纤毛肌高度.

主要成果:

  • 与开放角度的眼睛相比,闭合前腔角的眼睛的最大CBS宽度 (59 ± 179微米) 和最小CBS宽度 (17 ± 55微米) 相对较小 (541 ± 210微米和214 ± 107微米).
  • 闭角组 (293±111μm) 的最大纤毛肌高度也明显小于开角组 (593±557μm).
  • 最大的CBS宽度和最小的CBS宽度与开放的前腔角和轴长度正相关.

结论:

  • 与开放角度的眼睛相比,阴体流层 (CBS) 在具有慢性闭合,内皮化前腔角的眼睛中明显较小.
  • 角关闭可能会阻碍水性幽默进入状网和状体,从而可能减少输卵管膜和输卵管外的外流.