HOW DO CONTACTS CORRECT VISION PROBLEMS?
Dr. Jim Martin 12/08/2014
Being able to see clearly is a gift we can all appreciate. With contacts, you are able to walk into a room and light it up with your smile – no one has to know you have impaired vision. You are free to pursue your passions without having to worry about glasses falling off.As contacts are so small, just how do they work? Here is a little bit about the science behind these small, but powerful lenses.
The Basic Anatomy Of Vision
You see because of sensory receptors in the eye. The cornea of the eye is the frontal, outermost part. Behind the cornea is the iris and the lens. The retina is located in the back half of the eye. In this area, there are rods and cones that perceive colors and shapes.
When you look at something, the eye changes the shape of your lens to reflect light in such a way that a clear image is sent to the retina through the rods and cones and then to the brain.
Correcting Nearsighted Vision
If the eyeball is too long and the shape of the cornea is too steep, you may experience myopia or nearsightedness. In this case, the light rays converge just before the retina, creating a blurry image. Contact lenses work to move the focal point of light further back so that the image falls on the retina and can be seen properly.
Correcting Farsighted Vision
If the eyeball is too short and the cornea is too flat, then you may experience hypermetropia or farsightedness. In this case, when looking at images close up, the light rays converge just behind the retina, creating a blurry image. Contact lenses work to move the focal point forward so that the image falls on the retina and you can see clearly.
The Benefit Of Contacts
Contact lenses are much smaller than glasses because they rest directly on the eye. These thin lenses are comfortable enough to wear every day, making it possible for you to have great vision all of the time.
If you are ready to give contacts a try, reach out to our team at Broome Optical today.