MONDAY, Dec. 27 (HealthDay News) -- When medical experts talk about prevalence, they're usually referring to how common a particular disease might be. But in the case of cataracts, they might just as well be talking about how common it is to uncover misinformation and misunderstanding about the condition.

MONDAY, Dec. 27 (HealthDay News) -- Marilyn Norred has known for 30 years that she had cataracts in both eyes.

MONDAY, Dec. 27 (HealthDay News) -- Carbon monoxide poisoning is a serious threat, especially during the winter when people may use ovens and heating appliances to keep warm, says the American College of Emergency Physicians.

(HealthDay News) -- Varicose veins are enlarged, swollen veins in the legs that can be painful, although they're usually not serious.

(HealthDay News) -- Thyroiditis is an inflammation of the thyroid gland in the neck, located below the Adam's apple and above the collarbone. The thyroid regulates your body's metabolic processes, controlling your heart rate, for example.

MONDAY, Dec. 27 (HealthDay News) -- If your New Year's resolution involves losing weight, your best chance of success may be to divide your goal into small, manageable parts that you can work on every day, suggests an expert.

MONDAY, Dec. 27 (HealthDay News) -- The kind of formula babies drink has a major impact on weight gain and could affect their future risk of developing obesity, diabetes and other diseases, new research suggests.

SUNDAY, Dec. 26 (HealthDay News) -- How do people recognize an image of a face as belonging to a living human being and not a replica such as a doll or mannequin? A new study suggests that the eyes have it: they are crucial to helping people distinguish real faces from those that are not.

MONDAY, Dec. 27 (HealthDay News) -- Scientists have identified DNA sequence variations associated with abnormal heart rhythms that can cause heart damage and sudden death.

MONDAY, Dec. 27 (HealthDay News) -- A new study suggests that one of every 26 people in the United States will develop epilepsy at some point in their life.

MONDAY, Dec. 27 (HealthDay News) -- The size of your amygdala, an almond-shaped portion of the brain involved in emotions, may be as strong a marker for having rich and varied social relationships as how many "friends" you have on Facebook, researchers say.

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com: