If you understand how a camera works, you already have a good idea of how the human eye works. As light rays enter the eye, the cornea bends the light and allows it to pass through the iris to the eye’s natural lens. Like a camera’s, the eye’s lens is able to shorten or widen in order to focus. When people experience difficulty with their eyesight, there is most likely a problem with their eye’s refractive power. Continue reading to learn what these common refractive errors are:
- Hyperopia: Also known as farsightedness, hyperopia is the most common refractive error, affecting millions of individuals. Farsightedness, in which distant objects become focused behind your retina, occurs when the eyeball’s axis is too short or the eye’s refractive power is too weak. If you have trouble reading or observing close objects, you may be experiencing hyperopia.
- Myopia: The opposite of hyperopia is myopia, or nearsightedness. With this condition, distant objects become focused in front of your retina. Your eye’s axis may be too long, or your eye’s refractive power may be too strong. If distant objects appear out of focus for you, eyeglasses or contact lenses can easily correct the problem.
- Astigmatism: The condition known as astigmatism may be combined with nearsightedness or farsightedness. If your cornea has an abnormal curvature, it can cause two focal points to fall in different places. This brings on the blurred effect of objects that are both up close and at a distance.
- Presbyopia: People over the age of 50 are likely to encounter the condition known as presbyopia. This causes the center of the eye lens to harden and makes it difficult for the eye to keep its focus.
If you’re concerned about your eyesight, visit the friendly optometrists at Wize Eyes Eyewear and Eyeglass Stores in Long Island. You can schedule your eye exam by calling our office at (516) 358-0040. Visit us online to browse our wide selection of eyeglass frames.