health
defendernetwork.com
JULY 16 | 2015 | DEFENDER
1B
Defender Special Edition
EYE CARE:
Focus on good vision
H
By MARILYN MARSHALL Defender
ealthy eyes are an important part of your well-being, and there are numerous things you can do to see your best. From getting regular eye exams to eating right to knowing your family eye health history, you can help maintain good vision for years to come. African-Americans should be especially diligent about eye care, since they are at higher risk for vision loss from certain eye diseases. Dr. Nancy Webb, an ophthalmologist and chief of Ophthalmology at Kelsey-Seybold Clinic, said there are three eye disorders in particular that impact Blacks.
GLAUCOMA
“There is a higher prevalence of glaucoma in African-Americans, especially after the age of 40,” Webb said. “A family history of glaucoma also increases your risk. In general, there are no symptoms with the most common form of glaucoma, which we call open angle glaucoma. “We call it ‘the thief in the night’ because one can be slowly and progressively losing peripheral vision and have no awareness of this visual loss,” Webb said. “There is no pain associated with it either.” Webb said screening of asymptomatic individuals is the key to diagnoses and prevention of vision loss. “We measure intraocular pressure, which is usually high at the time of diagnosis, but not always,” Webb said. “We also assess optic nerve appearance, visual field testing and corneal thickness to make a diagnosis of glaucoma. “Once we have diagnosed glaucoma, the
first line of treatment is eye drops to lower intraocular pressure. We sometimes use combinations of drops. When drops are not effective or not tolerated, we can do a laser procedure to control the pressure. We also have surgical alternatives when drops or laser do not achieve the desired pressure,” Webb said.
DIABETIC RETINOPATHY
Diabetes is one of the most serious health problems facing African-Americans, and diabetic retinopathy is a complication of uncontrolled diabetes. “The best way to treat diabetic retinopathy is to try to prevent it through tight blood sugar control and rigorous adherence to a diabetic diet,” Webb said. “Weight loss and exercise are also
10 VISION FACTS
important in controlling diabetes.” She said once diabetic retinopathy has been diagnosed, the treatment depends on the severity of the retinopathy. “Diabetes can affect the walls of the blood vessels in the retina. The walls can become weak and develop microaneurysms which can bleed and leak fluid. This is called background diabetic retinopathy and can respond well to laser,” she said. “If left untreated, this can lead to proliferative diabetic retinopathy, with fragile new vessels forming which can bleed, leading to scarring of the retina, bleeding into the vitreous, and in some cases, traction on the retina and retinal detachment. “Sometimes injections into the (transparent jellylike tissue filling the eyeball behind the lens) of medications which can prevent the development of these new vessels is helpful.”
1. An estimated 828,000 African-Americans have diabetic retinopathy.
2. More than 520,000 African-Americans have glaucoma. 3. Approximately 14 million individuals 12 and older have visual impairment, among which more than 80 percent could be corrected.
4. Approximsately 6.8 percent of U.S. children under 18 have a diagnosed vision condition.
5. An estimated 61 million U.S. adults are at high risk for serious vision loss, but only half visited an eye doctor in the past 12 months.
6. More than 1.2 million people 40 and older are legally blind. 7. The annual economic impact of major vision problems among adults 40 and older is more than $51 billion.
8. Vision disability is one of the top 10 disabilities among adults
18 and older and one of the most prevalent disabling conditions among children. 9. Vision loss causes a substantial social and economic toll for millions of people, including disability, loss of productivity and diminished quality of life. 10. Nearly 25.7 million Americans 40 and older have cataracts. Sources: National Institute of Health, CDC, Prevent Blindness
CATARACT
Webb said cataracts are prevalent in AfricanAmericans, and diabetics also have a higher incidence of cataract, especially with poorly controlled diabetes. “Cataract is a clouding of the natural lens of the eye,” she said. “It may or may not be severe enough to be visually significant. If a patient does have a visually significant cataract, surgery with cataract extraction and replacement of the cloudy lens with an artificial lens is highly successful and done as a day surgery procedure.” Web said symptoms include blurred vision, problems in glare situations such as driving at night and problems from oncoming headlights, problems with glare from the sun and fuzzy vision when reading. According to the National Eye Institute, by age 80, more than half of all Americans either have a cataract or have had cataract surgery. The symptoms of early cataract may be improved with new eyeglasses, brighter lighting, anti-glare sunglasses, or magnifying lenses. If these measures do not help, surgery is the only effective treatment.
defendernetwork.com • Serving the Houston area for over 80 years