The Healthy Geezer
By Fred Cicetti
The Healthy Geezer is a column devoted to the health questions of geezers, all of us lovable and quirky seniors who are wondering what is going on with these bodies of ours. It is written by me, Fred Cicetti, a first-class geezer who’s been writing about health issues for more years than I like to talk about.
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Q. I’ve been noticing this thing in my eye. At first I thought it was an eyelash. Then I realized the thing was actually in my eye. One of my friends told me it’s a “floater,” and not to worry. What exactly is a “floater” and should I see a doctor?
To allay any fears you may have, I should tell you that floaters are usually nothing to worry about. I have them myself. More than 7 in 10 people experience floaters. Now for some biology.
The lens in the front of your eye focuses light on the retina in the back of your eye. The lens is like the one in a camera, and the retina is like film. The space between the lens and retina is filled with the “vitreous,” a clear gel that helps to maintain the shape of the eye.
Floaters occur when the vitreous slowly shrinks over time. As the vitreous changes, it becomes stringy, and the strands can cast shadows on the retina. These strands are the floaters. They can look like specks, filaments, rings, dots, cobwebs or other shapes. Floaters are the most vivid when you are looking at the sky or a white surface such as a ceiling. They move as your eyes move and seem to dart away when you try to look at them directly.
In most cases, floaters are just annoying. When you discover them, they are very distracting. But, in time, they usually settle below the line of sight. Most people who have visible floaters gradually develop the ability to make them “disappear” by ignoring them.
When people reach middle age, the vitreous gel may pull away from the retina, causing “posterior vitreous detachment.” It is a common cause of floaters, and it is more likely in people who are diabetics, nearsighted, had eye surgery, or suffered inflammation inside the eye.
These vitreous detachments are often accompanied by light flashes. The flashes can be a warning sign of a detached retina. Flashes are also caused by head trauma that makes you “see stars.” Sometimes light flashes appear to be little lightning bolts or waves. This type of flash is usually caused by a blood-vessel spasm in the brain, which is called a migraine. These flashes can happen without a headache and they are called an “ophthalmic migraine.”
If your floaters are just bothersome, eye doctors will tell you to ignore them. In rare cases, a bunch of floaters can hamper sight. Then a “vitrectomy” may be necessary. A vitrectomy is a surgical procedure that removes the vitreous gel with its floaters. A salt solution replaces the vitreous. The vitreous is mostly water, so patients who undergo the procedure don’t notice a difference. However, this is a risky procedure, so most eye surgeons won’t recommend it unless the floaters are a major impediment.
Many new floaters can sometimes appear suddenly. When this happens, it usually is not sight-threatening and requires no treatment. However, a sudden increase in floaters could mean that a part of the retina has pulled away from its normal position at the back wall of the eye. A detached retina is a serious condition and demands emergency treatment to prevent permanent impairment or even blindness.
What should you do when you notice your first floater? It’s a good time to get that eye examination you’ve been putting off.
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