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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

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...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

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...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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, whereas...
Ophthalmic Drug Delivery Systems01:23

Ophthalmic Drug Delivery Systems

Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...

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Modeling Cataract Surgery in Mice
05:19

Modeling Cataract Surgery in Mice

Published on: December 1, 2023

[Several notable problems in current development of cataract surgery].

Shou-zhi He

    [Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology
    |December 22, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Cataract surgery and intraocular lens technology are advancing rapidly. Addressing issues like persistent blindness and biased lens selection is crucial for improving outcomes in China.

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    Area of Science:

    • Ophthalmology
    • Surgical Technology
    • Biomedical Engineering

    Background:

    • Rapid advancements in cataract surgery and intraocular lens (IOL) technology are noted.
    • Persistent challenges include cases of irreversible blindness post-surgery and the uncritical adoption of novel techniques.

    Discussion:

    • The current understanding and application of individualized IOL selection exhibit biases.
    • There's a need to address the gap between technological progress and clinical implementation challenges.

    Key Insights:

    • Some patients still experience vision loss despite cataract surgery.
    • Inappropriate or premature introduction of new technologies can lead to suboptimal results.

    Outlook:

    • A balanced approach is required to integrate new surgical techniques and IOLs effectively.
    • Standardizing the comprehension and application of individualized IOL selection is vital for advancing cataract surgery in China.