The symptoms and signs associated with<unk>  are related to prolonged, visually demanding, near-centered tasks. They may include, but are not limited to, diplopia (double vision), asthenopia (eye strain), transient blurred vision, difficulty sustaining near-visual function, abnormal fatigue, headache, and abnormal postural adaptation, among others. In some cases, difficulty with making eye contact have been noted as a complaint amongst sufferers. Note that some Internet resources confuse<unk>  and divergence dysfunction, reversing them.
Convergence insufficiency
Strabismus
Vertebrobasilar insufficiency
Papillary stenosis
Monotropism
Ecotropism
Vitreomacular adhesion
Solvent drag