In a normal eye, light passes through a clear lens to the retina, where it is changed into nerve signals that are sent to the brain. The eye’s lens is made mostly of water and protein. Some of that protein may clump together and form what’s called a cataract, which
If you’re blessed with the gift of perfect or near-perfect eyesight, it can be quite jarring when you first experience a significant period of blurred vision. You’re not sure whether it’s a temporary occurrence or a sign that you might be losing your eyesight.
Blurred vision refers to a lack of
You won’t “ruin your eyesight” from reading in dim light—sorry, mom—but you may occasionally experience eye strain when you overtax your vision for prolonged periods. Fortunately, eye strain doesn’t lead to vision loss unless it’s associated with some underlying medical problem. In most cases, you can get to the bottom
Cataracts—clumps of protein that cloud the lenses of your eyes—are the most common cause of vision impairment in older adults; they affect more than 25 million Americans, 61 percent of whom are women.
How Cataracts Form
Cataracts may develop in one or both eyes. The lenses in your eyes are made primarily
If you sometimes have trouble recognizing faces, or you notice that pieces of letters are missing when you read even when you’re wearing glasses, you may have a condition called low vision.
The term “low vision” is defined as a visual impairment that cannot be restored with corrective devices, medical therapy,
For various reasons, your eyes may not provide clear, sharp vision—either near or far. The typical fixes are contact lenses or a pair of glasses (or two) to provide sharp vision at different distances. Most of us do just fine with these conventional corrections for blurry vision. But if you’re
Blurry vision is a classic “nonspecific” symptom that people report to their doctors—like “I feel tired all the time.” Whether it’s blurry seeing or feeling fatigued, the possible reasons are many and occasionally unusual, from poisoning to concussion. Regardless of cause, however, most people just want to know, “Why is
Ironically, many of us probably pulled out our reading glasses in order to find the answer to “What is presbyopia?” Presbyopia is the most common vision problem in people 40 and older. It is the inability to focus up close, such as when you are reading, looking at a computer
The simple answer to “what is astigmatism” is it’s changes in the eye that distort vision. It is one of the most common abnormalities, called refractive errors, that affect the way the eye bends, or refracts, light to form images on the retina. As a result of astigmatism, objects you
The eye is a complex organ and a lot can go wrong. Age-related eye conditions—macular degeneration, cataract, glaucoma, and diabetic retinopathy—can permanently damage vision and even lead to blindness. They collectively account for most serious vision loss and blindness in older adults. But many common eye diseases and conditions can