Also: Bicycle injuries are mounting, especially in adults; 5 truths about protecting your eyes.

Warning signs of a serious eye problem Eyes aren't exempt from the wear and tear of aging. Some of the age-related changes in the eyes are annoying but not serious — for example, it can become difficult to focus on near objects, and eyelashes may thin out a bit. But other changes can threaten vision. With age, the eyes' ability to stay lubricated starts to wane. This can leave eyes feeling irritated, sticky, dry, or gritty. The lens of the eye can become less elastic. Night vision may also start to suffer, which can pose problems when driving at night. In contrast, cataract, macular degeneration, and diabetic retinopathy can rob you of your sight. Get your copy of The Aging Eye As the eyes age, problems with vision become more common. Learn how to recognize the risk factors and symptoms of specific eye diseases — cataract, glaucoma, age-related macular degeneration, and diabetic retinopathy — and what steps you can take to prevent or treat them before your vision deteriorates. How do you know if an eye problem is a nuisance or the start of something serious? The following signs and symptoms warrant a call to your doctor. Catching serious eye problems early can help preserve your vision. Even non-vision-threatening problems can be treated to keep your eyes comfortable and your eyesight as sharp as possible. Call your doctor if you experience any of the following: Change in iris color Crossed eyes Dark spot in the center of your field of vision Difficulty focusing on near or distant objects Double vision Dry eyes with itching or burning Episodes of cloudy vision Excess discharge or tearing Eye pain Floaters or flashers Growing bump on the eyelid Halos (colored circles around lights) or glare Hazy or blurred vision Inability to close an eyelid Loss of peripheral vision Redness around the eye Spots in your field of vision Sudden loss of vision Trouble adjusting to dark rooms Unusual sensitivity to light or glare Veil obstructing vision Wavy or crooked appearance to straight lines For more information about preventing and treating eye disease, buy The Aging Eye, a Special Health Report from Harvard Medical School. Share this story: News and Views from the Harvard Health Blog Bicycle injuries are mounting, especially in adults These days, more and more adults bike to work, combining their daily workout with their daily commute, all while helping the environment. Unfortunately, biking is getting riskier. A new study found that between 1998 and 2013, the rate of bicycle injuries rose by 28% and the rate of people admitted to the hospital because of bike injuries rose by 120%. 5 truths about protecting your eyes Of your five senses, which one are you most afraid of losing? If you're like most people, your answer is your ability to see. Because our eyesight is so precious, it's no wonder that myths abound about what can damage our eyes — and what can protect them. Here, we debunk five common myths — and tell you how to truly keep your eyes healthy. Myth: Doing eye exercises will delay the need for glasses. Fact: Eye exercises will not improve or preserve vision or reduce the need for glasses. Your vision depends on many factors, including the shape of your eyeball and the health of the eye tissues, neither of which can be significantly altered with eye exercises. Myth: Reading in dim light will worsen your vision. Fact: Dim lighting will not damage your eyesight. However, it will tire your eyes out more quickly. The best way to position a reading light is to have it shine directly onto the page, not over your shoulder. A desk lamp with an opaque shade pointing directly at the reading material is ideal. Myth: Carrots are the best food for the eyes. Fact: Carrots, which contain vitamin A, are indeed good for the eyes. But fresh fruits and dark green leafy vegetables, which contain more antioxidant vitamins such as C and E, are even better. Antioxidants may even help protect the eyes against cataracts and age-related macular degeneration. Just don't expect them to prevent or correct basic vision problems such as nearsightedness or farsightedness. Myth: It's best not to wear glasses or contact lenses all the time. Taking a break from them allows your eyes to rest. Fact: If you need glasses or contacts for distance or reading, use them. Not wearing your glasses will strain your eyes and tire them out instead of resting them. However, it will not worsen your vision or lead to eye disease. Myth: Staring at a computer screen all day is bad for the eyes. Fact: Using a computer does not damage your eyes. However, staring at a computer screen all day can contribute to eyestrain or tired eyes. People who stare at a computer screen for long periods tend not to blink as often as usual, which can cause the eyes to feel dry and uncomfortable.  To help prevent eyestrain, adjust the lighting so it doesn't create a glare or harsh reflection on the screen, rest your eyes briefly every 20 minutes, and make a conscious effort to blink regularly so that your eyes stay well lubricated. For more information about keeping your eyes healthy, buy The Aging Eye, a Special Health Report from Harvard Medical School. Share this story: Featured in this issue The Aging Eye Featured content: • How the eye works • The eye examination • Cataract • SPECIAL BONUS SECTION: Choices in cataract surgery • Glaucoma •  ... and more! Click here to read more » Harvard Medical School offers special reports on over 50 health topics. Visit our website at http://www.health.harvard.edu to find reports of interest to you and your family. PHONE ORDERS - please call our toll-free number: 1-877-649-9457. You are currently subscribed to HEALTHbeat as dr.samah.saied.ahmed@gmail.com. EDIT YOUR SUBSCRIPTION PROFILE UNSUBSCRIBE SUBSCRIBE TO HEALTHbeat VIEW HEALTHbeat ARCHIVES Visit our website at: www.health.harvard.edu Email us at: healthbeat@health.harvard.edu FOLLOW US ON:  Facebook Twitter Copyright © 2015 by Harvard University. Harvard Health Publications, 10 Shattuck Street, 2nd Floor, Boston, MA 02115, USA * Please note, we do not provide responses to personal medical concerns, nor can we supply related medical information other than what is available in our print products or website. For specific, personalized medical advice we encourage you to contact your physician.