Long-term results of surgery for superior oblique palsy.

The results one month after surgery in 159 cases of superior oblique palsy were compared according to the method of surgery with the results 4 years or longer after surgery. There were 141 cases of congenital palsy and 18 cases of acquired palsy, for a total of 159 cases. Our study showed that surgery on the oblique muscle provided long-lasting effects, while recession of the superior rectus muscle or recession of the contralateral inferior rectus muscle could cause late overcorrection. When performing surgery on the rectus muscle, careful attention must be paid to suturing the muscle.