Eyes are a very sensitive part of the body. The slightest disturbance in the lens, cornea, retina, or iris can cause substantial effects to your vision such as a refractive error. While it would be wonderful to already have 20/20 vision, that is not the case for most Americans. About 75% of adults in America use some sort of vision correction. Most Americans suffer from some sort of impaired vision in their lifetime whether it be inherited at birth or progressively developed over time. The good news is that there are ways to correct your impaired vision, abling you to see much better.
Refractive errors are problems with the shape of the eye that result in light not bending properly on the retina which thus creates a blurry vision. Here are the four types of refractive errors that may occur:
Understanding how our eyes work:
There are four parts to your eye that directly affect how you see. These four parts are the cornea, iris (including the pupil), lens, and retina. The cornea is the top layer of the eye where all light must pass through. Behind the cornea is the iris and pupil. The iris, and pupil, allow light into the back of the eye. The lens is located behind the iris and it works with the cornea to refract light to be more focused on the retina. The retina, which is located at the back of the eye, is a complex layer of cells that reacts to light. The four parts of the eye work together to turn light into images and this is how we see. When you have a refractive error, it means that your eyes are bending the light away from the retina, which creates a blurry vision.
What you can do:
Using Corrective Eyeglasses
Eyeglasses are designed to be worn on your face, sitting on the bridge of your nose, just in front of the eyes. The curved shape of eyeglasses allows light to bend and focus properly on the retina to improve the image. Depending on the type of refractive error you have, will help determine the type of lens you will need to correct your vision. If you are nearsighted, you will need a prescription for a minus lens. The minus lens is thinnest at the center which moves the focal point backward. If you are farsighted, you will need a prescription for a plus lens. The plus lens is thickest at the center which moves the focal point forward.
Using Corrective Contact Lenses
Contact lenses function very similarly to eyeglasses. While glasses sit about a half-inch away from the eyes, contact lenses come into direct contact with the eye. They float on the tear film layer on the surface of the cornea allowing them to move naturally with your eyes. Contact lenses also come in plus or minus prescriptions and they are a round shape to help adjust the eyes to its specific needs. There are a variety of different contact lenses, but they either come as hard or soft.
Corrective eye surgery is meant to help with refractive errors either by reshaping the cornea, or by replacing your eyes natural lens. When it comes to corrective eye surgery, you have a few options.
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