prognosis of functional healing of infantile strabismus one hundred and forththree patients suffering from infantile strabismus who had undergone surgery on the horizontal eye muscles between the ages of 0 and 6 years were reexamined with the aim of establishing a correlation between the date of operation and functional healing binocular single vision in space in 89 patients 62 a cosmetically satisfactory result alignment was achieved the number of operations and functional healing binocular single vision in space in 89 patients 62 a cosmetically satisfactory result alignment was achieved the number of operations needed decreased with increasing age of the 89 patients with alignment 61 69 were found to have binocular single vision in space while 13 15 patients presented with stereopsis impairment of functional results was found to correlate with higher age at the first operation or on the date when alignment was reached for the first time respectively in cases with amblyopia or vertical divergences which had received insufficient postoperative treatment attainment of binocular single vision or respectively the stability thereof was impaired therefore with respect to functional healing early surgical correction of strabismus is only recommended if adequate postoperative conservative andor surgical aftertreatment is assured the postulate that successful functional healing can only be achieved by operations up to the second year early surgery is not supported by our data