In regards to the eye, the “angle” usually refers to the drainage angle inside the eye where excess ocular fluid (aqueous) is reabsorbed back into the blood stream.  This angle is located at the intersection of the iris and the white sclera of the eye … in other words, in a 360-degree ring where the “white” of the eye meets the “colored part” of the eye.  If this angle closes down, then you can have an angle-closure glaucoma, also known as acute glaucoma.

Dr. Timothy Root is a practicing ophthalmologist and cataract surgeon in Daytona Beach, Florida. His books, video lectures, and training resources can be found at:


  1. When it comes to eye anatomy, you can think of the eye like a kitchen sink. There is a:

    1. Faucet: The ciliary body keeps the eye full of aqueous fluid

    2. Drain: The trabecular meshwork drains away the excess aqueous fluid

    The trabecular meshwork is located at the intersection of the colored iris and the clear cornea (where the colored part of the eye meets the white of the eye). This intersection is called the “angle.”


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