Aqueous Humor

The Nourishment for The Eye

The aqueous humor is a clear fluid filling the space between the cornea and the iris, i.e., the anterior chamber.

The ciliary body, lying behind the iris constantly produces this fluid.

It nourishes the cornea and the lens; as well as gives a form and shape to the front of the eye.

The aqueous humor leaves the eye through channels in the anterior chamber.

Ultimately it drains into the bloodstream.

The channels draining the aqueous humor are situated in the anterior chamber angle.

In open angle glaucoma, the channels in the angle narrow with time, and the fluid stops draining properly.

The buildup of the fluid increases pressure in the eye.

This increased pressure reduces the blood supply to the optic nerve.

Consequently the field of vision starts developing blind spots in it.

The first to be affected is the peripheral vision.

Generally it is not noticeable until a good amount of vision gets lost.

If left untreated, it may lead to blindness.

Acute angle closure attack, caused by a shift in the position of the iris blocking the draining system of the aqueous humor, may lead to blindness much faster, and is treated surgically in emergency to open a new channel in the iris, thus immediately relieving pressure and preventing another attack that might have lead to the total blindness.

A perfectly healthy human eye, having no problems of either structure or function, can see only one part of everything it looks at, the best; and all other parts relatively worse than that. Such an eye is said to have the most acute vision through central fixation.

An eye with any kind of vision problems (which most people have - whether apparent or latent) - loses this central fixation and gets rather economically fixated. The only way out is to get that central fixation back (possible!) through vision therapy.

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