V pattern

A vertically incomitant horizontal strabismus where the deviation increases in a specific vertical gaze direction. In V-pattern exotropia, the outward deviation is greater in upgaze compared to downgaze or primary position. In V-pattern esotropia, the inward deviation is greater in downgaze compared to upgaze or primary position. The difference between upgaze and downgaze deviations must be at least 15 prism diopters to be considered clinically significant.