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相关概念视频

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

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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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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
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Glaucoma: Overview01:25

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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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Open Angle Glaucoma: Treatment01:27

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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.
Drugs such as carbonic anhydrase inhibitors, α2- and...
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Angle Closure Glaucoma: Treatment01:28

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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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Updated: Jan 18, 2026

Inducement and Evaluation of a Murine Model of Experimental Myopia
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过去的近视进展预测了未来的进展吗?

Wesley T Beaulieu1, Michael X Repka2, Stacy L Pineles3

  • 1Jaeb Center for Health Research, Tampa, Florida, United States.

Investigative ophthalmology & visual science
|January 16, 2026
PubMed
概括
此摘要是机器生成的。

球体等效折射误差 (SER) 和轴长 (AL) 的先前变化很难预测儿童未来近视的进展. 这些指标对于决策或试验参与者选择的临床实用性有限.

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科学领域:

  • 眼科医生 眼科 眼科
  • 儿科光学测量 儿科光学测量
  • 近视研究 近视研究

背景情况:

  • 近视的进展是儿科眼科护理的一个重要问题.
  • 准确预测近视的进展对于及时干预至关重要.
  • 以前的折射误差和轴长变化是未来进展的潜在指标.

研究的目的:

  • 为了评估球体等效折射误差 (SER) 和轴长 (AL) 以往变化的预测值,用于儿童未来的近视进展.
  • 量化使用过去的SER和AL测量的准确性,以预测随后的近视发展.

主要方法:

  • 一个随机对照试验的后期分析,涉及5-12岁儿童.
  • 分析了136名近视儿童 (SER -1.00至 -6.00 D) 的数据,这些儿童接受了0.01%的阿特罗宾或安慰剂治疗24个月.
  • 多变量线性回归评估了在前12个月和随后的12个月中SER/AL变化之间的关联.

主要成果:

  • 0.50-D SER增加的积极预测值在预测类似的增加后仅为42%.
  • 之前的12个月SER变化与随后的SER变化有很弱的关联 (0.20 D每1.00 D增加).
  • 通过将SER和AL的先前变化纳入,对未来进展的预测间隔得到了微不足道的改善.

结论:

  • 在12个月内SER和AL的变化是儿童未来近视进展的不良预测指标.
  • 这些发现表明,在近视管理决策中使用先前折射误差和轴长度变化的临床实用性有限.
  • 预测值不足以可靠地选择参与者参加近视控制临床试验.