All of the muscles in each eye must be coordinated by the brain for binocular vision to function
Strabismus is a visible misalignment of the eyes, with one eye turning in, out, up, down or at an oblique angle. Strabismus misalignment of the eyes can occur in some or all directions of gaze and can result in diplopia (double vision) or amylopia (lazy eye).
Amblyopia is regarded clinically as a 2-line difference from best corrected visual acuity in a structurally healthy eye.
Strabismus is one of the most common eye conditions affecting up to 5% of the Australian population. Prisms are used to measure the degree of the strabismus and double vision.