Surgical treatment of unilateral eye elevation defect caused by impaired elevating eye muscles (in absence of restrictive processes); uses 270¡ limbal peritomy to expose superior, medial, and lateral rectus muscles. Inferior border of rectus muscle is attached to nasal border of superior rectus muscle insertion. Upper border of medial rectus is attached slightly superior and nasal to inferior pole of medial rectus muscle. Lateral rectus muscle is then transposed to lateral border of superior rectus muscle. Procedure can correct 30Ð35 prism diopters of hypotropia.