As kids prepare to head back to school, add getting an exam to their back-to-school routine.

According to the American Optometric Association, 25 percent of kids have a visual impairment. Children’s eyes can change quickly, so it’s a good idea to get their eyes examined regularly.

Visual impairments can affect your child’s performance at school. Some signs that your child might have a visual impairment include: rubbing their eyes, headaches, loses his or her place when reading, makes reversals when writing or reading, leaves out small words when reading, squints when reading or watching TV, and avoids close work.

If you notice any of these symptoms in your child, it’s a good idea to get them to the eye doctor before the school year begins. Struggling with a visual impairment can affect the way your child learns or progresses.