[The "3-step" test in the diagnosis of vertical strabismus].

Examination of the oculomotor apparatus in 130 patients after scleroplastic operations and in 65 patients with vertical squint, forced position of the head, by means of the method of coordimetry and a proposed Parks' (in Hardesty's modification) test "three steps" has shown this test to be valuable as a simple, requiring no technical equipment and accessible to practitioners, method of diagnosing vertical squint in children and adults. It is shown that this test can be computerized and assessed by means of microcalculators.