[Quantified surgery of esotropia].

The effects of surgery on the minimal angle were studied on sixty children, strabismic in visual isoacuity, equipped with their optical correction, with a follow up of six months. The surgical procedures, medial rectus recession and lateral rectus flecting, were carried out under an operating microscope. No Faden Operation was carried out. A constant K is defined for each operation as the quotient of the angular reduction dA0 by the sum in millimeters of the movement on the medial rectus DI and the lateral rectus DE divided by two, or K = dA0/(DI + DE/2). The clinical, statistical and surgical incertitudes are analysed. The concomitant surgery, eye by eye, thus demonstrated, allows a better modulation of the surgical gesture as the action on the lateral rectus tempers that of the medial rectus.