How Do I Fight Those Dry Winter Days?
The weather outside is frightful…Fighting those winter blues Our dry Alberta winter weather wreaks havoc on our eyes as well as our bodies. How can we combat those winter blues?
EYE ANATOMY
HOW THE EYE WORKS
Cornea: Is the transparent front surface of the eye that allows light to travel through. It also provides most of the eye’s optical power.
Pupil: Is an opening in the center of the iris that regulates the amount of light that enters the eye.
Iris: Pigmented tissue behind the cornea which gives your eye color. It also contains muscles which control the size of the pupil regulating the amount of light entering the eye.
Lens: Transparent tissue that focuses light rays on the retina.
Retina: Part of the eye that converts light (what we see) into electrical impulses for the optic nerve to send to the brain. It contains 10 layers.
Macula: Small central area of the retina responsible for your central vision and the clarity in your vision.
Vitreous: Colorless, transparent, gelatinous fluid that fills the space between the lens and retina.
Optic Nerve: Largest bundle of nerve fibers of the eye. It carries electrical impulses to the brain.
Sclera: White part of the eye. It is a protective fibrous layer that covers the front of the eye, except for where the cornea is.
Ciliary Body: Ring of muscle in the eye that changes the shape of the lens to allow the eye to focus and creates aqueous humor.
Aqueous Humor: Clear fluid that fills the space between the cornea and the lens.
Choroid: Vascular layer of the eye between the sclera and retina. It contains blood vessels which provide oxygen and other nutrients to the eye.
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