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Related to Knapp procedure: double elevator palsy
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Four patients underwent the Knapp procedure, and one patient underwent partial tendon Knapp procedure combined with horizontal muscle recession (table 1).
Recently, tucking of IR of normal eye is also done to remove residual hypotropia and pseudoptosis that may persist after the Knapp Procedure 11.
Twelve patients had IR recession with or without one horizontal muscle recession or resection, 12 had Knapp procedure for the correction of horizontal deviation, if present, 10 had IR recession followed by Knapp surgery, with or without recession or resection of horizontal recti.