1) Operation 2) Surgery 3) Surgical operation 4) Surgical procedure 5) Surgical process 
surgical removal of a squint
• (n.) The operation for the removal of squinting by the division of such muscles as distort the eyeball.
(strә-bot´ә-me) cutting of an ocular tendon in treatment of strabismus.
Stra·bot'o·my noun [ Greek ... squinting + ... to cut.] (Surg.) The operation for the removal of squinting by the division of such muscles as distort the eyeball. 
[n] - the surgical operation of cutting a muscle or tendon of the eye in order to correct strabismus
noun the surgical operation of cutting a muscle or tendon of the eye in order to correct strabismus
the operation of cutting one or more of the muscles of the eye to correct strabismus.