Eye health is important as the eye is the organ of sight and is one of a pair connected to the front of the brain by optic nerves.
The eye can be thought of as a complex and ingenious camera constantly receiving images and feeding them back to the brain for interpretation. When you see something your eyes actually pick up the light rays that are reflected from that object. As light rays enter your eye, they pass through and are refracted (bent) by the cornea which is the clear, dome shaped front central part of the eye. The cornea provides two thirds of the optical power of the eye.
The light then passes through the pupil which is the black circular opening in the centre of the iris.The iris is the coloured part of your eye. The pupil dilates (opens) or constricts (closes) to adjust for the amount of light which is entering the eye. Behind the iris is the crystalline lens which is clear and flexible. Light passes though the lens and through the vitreous humour (a clear jelly-like substance) which fills the rear chamber. The light finally comes to a focus on the fovea centralis, an area of the retina. The retina is a thin light-sensitive tissue lining the back of the eye. The retina can be likened to the film in a camera. The optic nerve then transmits the image to the brain for interpretation.
Lacrimal glands in the eye secrete a substance called tears. These serve many functions including; lubricating or keeping the surface of the eye moist, cleaning the eye of debris, providing antibacterial action; and forming a smooth regular surface on the eye preventing distortion of light. Tears are important to contact lens wearers because when a contact lens is on the eye, it floats on and is covered by a layer of tears.
DISCLAIMER: This information is an educational aid only. It is not intended to replace medical advice for individual conditions or treatments. Talk to your doctor, pharmacist, nurse or naturopath before following any medical regimen to see whether it is safe and effective for you.