One major sign and symptom of a binocular vision problem is headaches. Headaches can occur after or during reading, while using the computer, as well as during driving. It is important if you have headaches to see your eye care provider for a full examination.
A school-aged child who complains of a chronic headache, typically for several months may have Convergence Insufficiency (CI) . The child may have difficulty with learning to read; in particular, the child may hold reading material close to the face in an attempt to overcome the blurry vision. This process usually overtaxes already weak convergence amplitudes, which are a measure of a person's ability to focus both eyes simultaneously on a reading target. The problem may occur several times a week, if not daily, and may occur in school or with homework, with relief on weekends or vacations. The child does not complain of headaches that awaken the child from sleep or of headaches that occur upon awakening in the morning. Nausea and vomiting do not occur with this condition. The child may complain of double vision or may be seen closing or covering one eye, presumably to avoid double vision.
The signs and symptoms of this condition are exactly the same as convergence insufficiency. The child may complain of blurry vision or may simply complain of headache with or after reading. Sometimes, accommodative spasm may be the diagnosis. In this situation, the child becomes focused excessively at near, actually locking the eyes in this focused position. Blurry vision occurs when the eyes are raised to look in the distance.
Any strabismus may cause headaches, with the same signs and symptoms as convergence insufficiency. Frequently, parents may notice a child covers or squints one eye with either reading or distance activity or both. Presumably, this action occurs because the child is attempting to avoid having double vision.