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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

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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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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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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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Related Experiment Video

Updated: Dec 6, 2025

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
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Automatic Glaucoma Detection from Stereo Fundus Images.

Ee Ping Ong, Jun Cheng, Damon W K Wong

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |October 6, 2020
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    Summary
    This summary is machine-generated.

    This study introduces a novel method for automatic glaucoma detection using stereo fundus images. The approach accurately calculates the optic cup-to-disc ratio for early glaucoma diagnosis.

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    Area of Science:

    • Ophthalmology
    • Medical Imaging
    • Computer Vision

    Background:

    • Glaucoma is a leading cause of irreversible blindness worldwide.
    • Early detection is crucial for managing glaucoma and preventing vision loss.
    • Accurate measurement of the optic cup-to-disc area ratio is a key diagnostic indicator.

    Purpose of the Study:

    • To develop and validate a new automated method for glaucoma detection.
    • To accurately segment the optic cup and optic disc from stereo fundus images.
    • To calculate the optic cup-to-disc area ratio for glaucoma diagnosis.

    Main Methods:

    • Utilizing stereo fundus image pairs to estimate a disparity map.
    • Segmenting the optic disc from a single fundus image.
    • Employing active contour segmentation on the disparity map to isolate the optic cup.
    • Calculating the optic cup-to-disc area ratio based on segmented regions.

    Main Results:

    • The proposed method demonstrates efficacy in automatic glaucoma detection.
    • Accurate segmentation of optic cup and disc was achieved.
    • The optic cup-to-disc area ratio was reliably computed.

    Conclusions:

    • The developed method offers a promising automated approach for glaucoma screening.
    • This technique can aid ophthalmologists in early glaucoma diagnosis.
    • Further validation on larger datasets is warranted.