• The surgical correction in the primary position was compared in one group of patients who underwent horizontal surgery without an A or V pattern with a matched group who underwent horizontal surgery with monocular vertical displacement for the A and V patterns. No signiffcant difference was found, and it was concluded that the determination of the amount of horizontal surgery is the same whether monocular vertical displacement is performed or not.
Pullman MD, Goldstein JH. Effect of Monocular Vertical Displacement on the Deviation in Primary Position. Arch Ophthalmol. 1980;98(11):2001-2003. doi:10.1001/archopht.1980.01020040853013