On occasion, an eye exam will reveal that a person has a significant difference between the refractive power of each eye. For example, one eye may be nearsighted while the other is farsighted. The potential problem with this disparity in refractive power, known as “anisometropia,” is that youngsters with eyes of different focusing ability may have eyes that appear normal, which leads to the condition going undetected. As a result, the child may go on to develop amblyopia (“lazy eye”) and below-normal stereoacuity (3-D vision) if their brains were to selectively ignore the image from one eye. Providing glasses that correct any significant difference between the eyes maximizes the potential for clear 3-D vision. People with anisometropia are also prone to “aniseikonia,” which causes affected individuals to see images that differ in size or shape with each eye. Children cannot recognize or articulate whether they are having a vision problem, so it’s important for parents to be attentive. Does your child rub his or her eyes, bump into things, or have difficulty picking things up? These may be symptoms of a vision problem. Even if your child doesn’t exhibit obvious vision problem, it’s important to have routine eye health exams.