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相关概念视频

Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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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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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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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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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...
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通过两种管理机制有效减少近视的进展.

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    低剂量氨酸有效地减缓了近视的进展在儿童超过三年,在晚年看到的效果更大. 组合疗法没有显著的附加益处,但双焦镜头减少了反弹效应.

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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
    • 控制近视 控制近视

    背景情况:

    • 近视的进展是儿童的一个重大问题.
    • 需要有效的干预措施来减缓轴延长和预防高近视.
    • 低剂量氨酸和专用隐形眼镜是新兴的治疗方法.

    研究的目的:

    • 为了评估0.01%的阿特罗宾在抑制近视进展的有效性,超过三年.
    • 为了评估外围失焦隐形眼镜与氨酸的添加效应.
    • 为了研究治疗停止后近视进展的反弹效应.

    主要方法:

    • 一项前性研究涉及127名5-8岁儿童.
    • 三个治疗组:使用单眼镜的阿特罗平 (At+SV),使用外围失焦隐形眼镜的阿特罗平 (At+PDCL) 和使用双焦隐形眼镜的阿特罗平 (At+DF).
    • 一个对照组接受了单眼镜. 折射率每六个月进行一次测量,为期三年和停止后的一年.

    主要成果:

    • 近视的进展在三年内显著减少,特别是在第二年和第三年 (P < .01).
    • 在三年后,在At+SV,At+PDCL和At+DF组之间没有观察到近视进展的统计学上显著差异 (P < .05).
    • 与治疗后的At+SV组相比,At+DF组显示了统计学上显著的较低的反弹效应.

    结论:

    • 0.01%的阿特罗宾在三年内有效减缓近视的进展,在治疗后的几年中有效性增加.
    • 在这个队列中,与外围失焦隐形眼镜的组合疗法并没有在统计学上表现出明显的优势,而不是阿特罗单一治疗.
    • 双焦点隐形眼镜可以减轻在停止阿特罗平治疗后近视进展的反弹效应.