Turned Eye is a condition that interferes with binocular vision because it prevents a person from directing both eyes simultaneously towards the same fixation point; the eyes do not properly align with each other. Heterotropia is a medical synonym for the condition. Colloquial terms for Turned Eye include “cross-eye”, “wall-eye”, and a “cast of the eye”. In British English it is sometimes referred to as a “squint”, though that word more broadly is a verb meaning ‘to narrow the eye opening’, not related to Turned Eye .
Turned Eye typically involves a lack of coordination between the extraocular muscles, which prevents directing the gaze of both eyes at once to the same point in space; it thus hampers proper binocular vision, and may affect depth perception adversely. Turned Eye is primarily managed by ophthalmologists, optometrists, and orthoptists. Turned Eye is present in about 4% of children. Turned Eye Treatment should be started as early as possible to ensure the development of the best possible visual acuity and stereopsis. It is from the Greek strabismós.
When observing a patient with Turned Eye , the misalignment of the eyes may be quite apparent. A patient with Turned Eye and a constant eye turn of significant magnitude is very easy to notice. However, a small magnitude or intermittent Turned Eye can easily be missed upon casual observation. In any case, an eye care professional can conduct various tests, such as cover testing, to determine the full extent of the Turned Eye.
Turned Eye can be seen in Down syndrome, Loeys-Dietz syndrome, cerebral palsy, and Edwards syndrome.
Symptoms of Turned Eye include double vision and/or eye strain. To avoid double vision, the brain may adapt by ignoring one eye. In this case, often no noticeable symptoms are seen other than a minor loss of depth perception. This deficit may not be noticeable in someone who has had Turned Eye since birth or early childhood, as they have likely learned to judge depth and distances using monocular cues. However, a constant unilateral Turned Eye causing constant suppression is a risk for amblyopia in children. Small-angle and intermittent Turned Eye are more likely to cause disruptive visual symptoms. In addition to headaches and eye strain, symptoms may include an inability to read comfortably, fatigue when reading, and unstable or “jittery” vision.