4 Types of Vision Changes
Most people experience some types of vision changes as they go through life. Some result from eye diseases, but most are caused by genetic factors or normal aging processes. Here are some of the ways that you may find your vision changing over time.
Myopia is the medical term for nearsightedness. Things that are close to you may be fairly clear, but the more distant objects are, the blurrier they appear. There are many ways of correcting myopia, including glasses, contacts, and LASIK surgery. If the effects are relatively mild, it may be possible to correct myopia with corneal refractive therapy lower Sackville.
Astigmatism occurs when the front of your eye is more oval-shaped than rounded. This causes light to get bent in different directions when it enters your eye, causing objects to appear blurry. Astigmatism can occur by itself or along with other refraction errors. In the past, people with astigmatism had to wear glasses for vision correction, but advances in technology have made it possible for people with astigmatism to wear contacts.
Hyperopia is farsightedness, the opposite of myopia. Objects viewed at a distance are clear, but those close up appear blurry. As with myopia, people with hyperopia can also have astigmatism that causes objects to become blurry at any distance.
Presbyopia literally means “old eyes.” As you age, the lens of your eye becomes harder and less flexible. This makes focusing on close-up images more difficult because the lens can no longer change its shape to accommodate it. Presbyopia is a normal part of the aging process. It can be corrected with bifocal lenses or refractive surgery.
Cataracts also occur with age but are different from presbyopia. The term refers to an abnormal clouding of the lens that prevents it from letting light in. Cataracts cannot be corrected with refractive lenses and require surgery to treat.