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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

689
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...
689
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

521
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...
521
Assessment of blood pressure in brachial artery(two-step method)01:23

Assessment of blood pressure in brachial artery(two-step method)

833
Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
833
Special considerations while measuring blood pressure01:28

Special considerations while measuring blood pressure

797
When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
797
Errors occurring during blood pressure monitoring01:25

Errors occurring during blood pressure monitoring

827
Blood pressure monitoring is a crucial clinical procedure in diagnosing and managing various cardiovascular conditions. Despite its significance, the accuracy of blood pressure measurements can be compromised by multiple factors, potentially leading to either falsely high or low readings. These inaccuracies are critical as they can significantly impact patient care. So, it is vital to understand these challenges deeply and adopt strategic approaches to minimize errors.
Several factors...
827
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

617
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...
617

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Related Experiment Video

Updated: Aug 20, 2025

Trabecular Meshwork Response to Pressure Elevation in the Living Human Eye
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[Tonometry: Review and Perspectives].

Rémi Yaïci, Gerd Geerling

    Klinische Monatsblatter Fur Augenheilkunde
    |November 17, 2022
    PubMed
    Summary
    This summary is machine-generated.

    Accurate intraocular pressure (IOP) measurement is vital for glaucoma management. This review covers contact tonometry, including indentation tonometers and the Goldmann applanation tonometer, discussing their development and application.

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    Area of Science:

    • Ophthalmology
    • Biomedical Engineering

    Context:

    • Glaucoma diagnosis and treatment rely heavily on consistent intraocular pressure (IOP) monitoring.
    • Contact tonometry represents the earliest instrumental approach to IOP measurement.

    Purpose:

    • To review the physiological principles underlying IOP measurement.
    • To present contact tonometry methods, including indentation tonometry and Goldmann applanation tonometry.
    • To discuss the historical development and advancements in these techniques.

    Summary:

    • This review focuses on contact tonometry, detailing indentation tonometers as the first instrumental method and the Goldmann applanation tonometer as the current gold standard.
    • It explores the physiological basis of IOP measurement and the evolution of these contact tonometry techniques.

    Impact:

    • Provides a foundational understanding of established IOP measurement techniques crucial for glaucoma diagnosis.
    • Highlights the historical significance and ongoing relevance of Goldmann applanation tonometry in clinical practice.
    • Sets the stage for further discussion on subsequent developments in IOP measurement technology.