Report Abuse. Yes, I'm sorry but they eat blood. That's why they are usually found on the scalp and not in the lengths of the hair. Yes it's very common for kids of all ages to get them I suggest you keep your hair bunched when with your nieces.
Convergence insufficiency is a difficulty or inability of the eyes to converge and work together at a near distance for extended periods of time, such as when reading, writing, drawing, or viewing a computer screen.
Sometimes, there is an inability to converge the eyes at all, which can result in diplopia (double vision). With convergence insufficiency, headaches, dizziness, and/or nausea can result when doing near work for awhile. This can lead to an inability to concentrate and even irritability. This condition is caused by a muscle imbalance, where the lateral rectus muscles exert more tension on the eyes than the medial rectus muscles do. Often, this can be treated with visual therapy and/or base-in prismatic power in lenses.