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Doctor insights on: Tests For Narrow Angle Glaucoma

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Define narrow angle glaucoma?

Define narrow angle glaucoma?

Narrow angle highiop: Narrow angle glaucoma is a condition where the eye pressure is elevated due to mechanical blockage of the trabecular meshwork by the peripheral iris. ...Read more

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Dr. Robert Chang
1,018 doctors shared insights

Glaucoma (Definition)

Glaucoma refers to a group of eye conditions that lead to damage to the optic nerve, the nerve that carries visual information from the eye to the brain. In many cases, damage to the optic nerve is due to increased pressure in the eye, also known ...Read more


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What is narrow-angle glaucoma?

What is narrow-angle glaucoma?

Anatomical Proble: Angle closure glaucoma is far less common than open angle glaucoma. The pathology is based on an anatomical narrowing of the drainage site where fluid made inside the eye drains out. Think plumbing: a clogged drain backs up, and in the eye the pressure increases dramatically. Very painful and vision can be lost entirely in a few hours. High risk patients should be treated, but only if high risk. ...Read more

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Narrow angle glaucoma---who gets it? What is that?

Narrow angle glaucoma---who gets it? What is that?

Serious eye problem: Angle closure is when the outflow of aqueous humor is completely blocked and the eye pressure builds up to dangerous levels potentially causing blindness sometimes within 24 hours. It is more common in asian and native american populations particularly in alaskan eskimos. ...Read more

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What is the difference between narrow-angle glaucoma vs closed-angle glaucoma?

Glaucoma: The angle is defined by the cornea and the iris. If the angle is narrow, there is less space for aqueous fluid to leave the eye through an area called the trabecular meshwork. A closed angle is completely blocked from aqueous egress. The treatment for this is a simple laser procedure. Contact your ophthalmologist if you are concerned about this condition. ...Read more

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What is the difference between narrow-angle glaucoma and other types of glaucoma?

Glaucoma types: Most glaucoma is open angle - the fluid drainage space in the front is wide and the drains within it are obstructed leading to increased pressure over time. Narrow angle, mostly in hyperopes (those with eyeglass lenses that act as magnifiers), can in older folks (over 50 or so), quickly within hours mechancially block fluid flow causing an acute glaucoma attack. This is an emergency! ...Read more

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Can you tell me what is the difference between narrow-angle glaucoma and closed-angle glaucoma?

Can you tell me what is the difference between narrow-angle glaucoma and closed-angle glaucoma?

Spectrum: A narrow angle vs. A closed angle is a spectrum from partially closed to completely closed as seen on gonioscopy or other angle imaging methods. A closed angle often has scarring, though it can be appositionally closed and thus still able to open. The angle status affects treatment of glaucoma, and sometimes narrow angle configuration is a precursor or risk factor for developing glaucoma. ...Read more

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Why should Valium not be used if I have narrow angle glaucoma?

Pressure can rise: Valium is in a class of drugs that the fda has listed as a contraindication because of a potential further reduction in the angle of the eye responsible for passage of the eye fluid. If that angle is already narrow, any further narrowing may result in blockage of fluid flow causing the eye pressure to build up and cause redness, pain, and glaucoma damage to the eye nerve, which can be permanent. ...Read more

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Why shouldnt Valium be used if you have narrow angle glaucoma?

Could cause pressure: Valium is a muscle relaxant which selectively affects skeletal muscle fibers more than smooth muscle fibers found in the iris and pupil. The thinking would be that if valium or diazepam relaxes the iris muscles it could trigger angle closure glaucoma -a medical emergency. I've never seen that happen to a patient on valium and if you have a laser iridotomy it will prevent this. ...Read more

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How is it that Valium should not be used if you have narrow angle glaucoma?

How is it that Valium should not be used if you have narrow angle glaucoma?

It depends: Valium belongs in a class of medications that, in theory, could precipitate an angle closure attack (as a weak anticholinergic). In practice, this is not an absolute contraindication. What is more important is to ensure that your narrow angles are managed by your ophthalmologist (either with laser+/-medication). ...Read more