ln &;V&;-Exotropia amount of detion

A' AND 'V' PATTERN HETEROTROPIA The terms 'A' or 'V' pattern squint are labelled when the amount of detion in squinting eye varies by more than 10deg and 15deg, respectively, between upward and downward gaze. 'A' and 'V' esotropia. In 'A' esotropia the amount of detion increases in upward gaze and decreases in downward gaze. The reverse occurs in 'V' esotropia. 'A' and 'V' exotropia. In 'A' exotropia the amount of detion decreases in upward gaze and increases in downward gaze. The reverse occurs in 'V' exotropia. Ref:- A K KHURANA; pg num:-334