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Related Concept Videos

Clinical Trials01:16

Clinical Trials

Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
Clinical Trials: Overview01:11

Clinical Trials: Overview

Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
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...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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...
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...

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Informing Endpoints for Clinical Trials of Geographic Atrophy.

Eleonora M Lad1, Monika Fleckenstein2, Frank G Holz3

  • 1Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina, USA;

Annual Review of Vision Science
|September 18, 2024
PubMed
Summary
This summary is machine-generated.

Geographic atrophy (GA) treatments show modest GA lesion reduction but not improved vision. This review explores GA growth factors and the disconnect between anatomical and functional outcomes.

Keywords:
age-related macular degenerationfunctional endpointsgeographic atrophylow-luminance visual acuitymicroperimetryreading speedstructural endpoints

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Area of Science:

  • Ophthalmology
  • Retinal Diseases
  • Age-Related Macular Degeneration

Background:

  • Geographic atrophy (GA) is an advanced form of age-related macular degeneration with unmet treatment needs.
  • Current treatments targeting the complement pathway offer limited efficacy, showing modest GA lesion reduction without significant visual function improvement.

Purpose of the Study:

  • To review GA morphology and factors influencing lesion expansion.
  • To analyze the relationship between GA growth and visual function measures.
  • To address the discordance between anatomical and functional endpoints in GA clinical trials.

Main Methods:

  • Literature review of studies on GA morphology and progression.
  • Analysis of factors affecting GA lesion growth rates and directionality.
  • Examination of the correlation between GA expansion and visual function outcomes.

Main Results:

  • GA lesion expansion is influenced by various morphological factors.
  • A disconnect exists between reduced GA growth and improved visual function in current trials.
  • Current endpoints may not adequately capture treatment benefits on visual function.

Conclusions:

  • Understanding GA growth dynamics is crucial for developing effective therapies.
  • Aligning anatomical and functional endpoints is essential for accurate assessment of GA treatments.
  • Further research is needed to bridge the gap between lesion stabilization and functional vision improvement.