asthenopia

Disorder in which the subject finds it difficult to keep both eyes aligned with each other, causing asthenopia.

Another problem is Asthenopia.

Convergence insufficiency is a common binocular vision disorder characterized by asthenopia, eye fatigue and discomfort.

Dysmetropsia in one eye, a case of aniseikonia, can present with symptoms such as headaches, asthenopia, reading difficulties, depth perception problems, or double vision.

The major symptom is intermittent blurring of distance vision particularly noticeable after prolonged periods of near work, and symptoms of asthenopia.

People with hyperopia can experience blurred vision, asthenopia, accommodative dysfunction, binocular dysfunction, amblyopia, and strabismus.

Although a person may not notice mild astigmatism, higher amounts of astigmatism may cause blurry vision, squinting, asthenopia, fatigue, or headaches.

Sometimes, asthenopia can be due to specific visual problems, for example, uncorrected refraction errors or binocular vision problems such as accommodative insufficiency or heterophoria.

Although neither study examined reading efficiency or comprehension, both demonstrated that computerized home orthoptic exercises, when combined with weekly in-office vision therapy, were more effective than "pencil pushups" (a commonly prescribed home-based treatment) for improving the symptoms of asthenopia and the convergence ability of the eyes.

If it is desired to light a roadway (perhaps due to heavy and fast multilane traffic), to avoid the dangers of casual placement of street lights it should not be lit intermittently, as this requires repeated eye reajustment which implies asthenopia and temporary blindness when entering and leaving light pools.