How Smoking Harms Your Vision
See also: Smoking infographic
Smoking is the single largest preventable cause of disease and premature death in the United States. It harms nearly every organ in your body including your eyes.
Adverse and often fatal health effects of cigarette smoking such as heart disease and cancer are all too familiar, but sight-threatening vision and eye problems generally are less well-known.
Here are more reasons you should kick the habit:
Smoking and Cataracts
Smokers significantly increase their risk of developing a cataract compared with non-smokers. In fact, studies show that people who smoke double their chance of forming cataracts, and the risk continues to increase the more you smoke.
Smoking and Macular Degeneration
Macular degeneration causes "blind spots" and often severely impairs central vision. AMD is the leading cause of permanent vision loss among Americans age 65 and older.
Studies show smokers can have a three-fold increase in the risk of developing AMD compared with people who have never smoked. And female smokers over age 80 are 5.5 times more likely to develop AMD than non-smokers of the same age.
But it's not all bad news: because smoking is the biggest controllable risk factor associated with AMD, quitting smoking at any age, even later in life, can significantly reduce your risk of developing AMD.
Quitting smoking can reduce your risk of eye conditions that cause vision loss.
Smoking and Uveitis
Uveitis (inflammation of the eye's middle layer, or uvea) is a serious eye disease that can result in complete vision loss.
Evidence shows smokers are more likely than non-smokers to have uveitis, and smoking appears linked to the development of uveitis. One study found smoking was associated with a 2.2 times greater than normal risk of having the condition.
Smoking and Diabetic Retinopathy
Diabetic retinopathy damages the blood vessels of the retina and can result in vision loss.
More than 5 million Americans age 40 and older have diabetic retinopathy due to type 1 or type 2 diabetes. And that number will grow to about 16 million by 2050, according to the U.S. Centers for Disease Control and Prevention.
Smoking may as much as double the risk of developing diabetes.
There also is a causal relationship between smoking and both the development and progression of diabetic retinopathy, in addition to numerous other diabetes complications.
Smoking and Dry Eyes
Dry eye syndrome describes insufficient tears on the eye's surface, which are needed to keep the eye lubricated and healthy. Sufferers of dry eye can experience eye redness, itchiness, a "foreign body" sensation and even watery eyes.
Tobacco smoke is a known eye irritant and worsens dry eye even among second-hand smokers particularly for contact lens wearers. People who smoke are nearly twice as likely to have dry eyes.
Smoking and Infant Eye Disease
Women who smoke during pregnancy transmit dangerous toxins to the placenta, potentially harming the unborn child. Smoking while pregnant increases the chance of many fetal and infant eye disorders, among other serious health problems.
Also, women who smoke during pregnancy are more likely to give birth prematurely; all babies born prematurely are at greater risk of eye problems than full-term babies.
Vision problems of premature babies include retinopathy of prematurity, a potentially blinding disease.
Are You Ready To Quit?
It's never too late to quit smoking and enjoy the benefits of a healthier lifestyle and, ultimately, a healthier body. Quitting smoking at any age can reduce your risk of developing many sight-threatening eye conditions.
Visit www.smokefree.gov to get started, or see your doctor, who can recommend other methods to help you on your journey to a smoke-free life.
Gary Heiting, OD, reviewed this article.
About the Author: Aimee Surtenich has many years of editorial experience in consumer publishing, with an emphasis on the health, pharmaceutical and beauty fields. Previously she was the executive editor for this website.
Connect with Ms. Surtenich via Google+.
A prospective study of cigarette smoking and risk of cataract in men. JAMA. August 1992.
A prospective study of cigarette smoking and risk of cataract in women. JAMA. August 1992.
Prevalence of age-related macular degeneration in the United States. Archives of Ophthalmology. April 2004.
Smoking and age related macular degeneration. British Journal of Ophthalmology. January 2006.
Cigarette smoking as a risk factor for uveitis. Ophthalmology. March 2010.
Uveitis and smoking information presented at the 2009 annual meeting of the Association for Research in Vision and Ophthalmology.
Cigarette smoking and diabetes. Progress in Cardiovascular Diseases. March-April 2003.
Prevalence of and risk factors for dry eye syndrome. Archives of Ophthalmology. September 2000.
Smoking and blindness. British Medical Journal. March 2004.
[Page updated May 2013]