[A topographical survey of the insertions of horizontal recti in strabismus]

The distance to the limbus and breadth of the insertions of the horizontal recti were measured in 857 strabismic patients during operation. The average distance and breadth of MR were 4.99 mm and 10.02 mm, and those of the LR were 6.48 mm and 9.47 mm respectively. The insertion of MR in esotropia (4.87 mm) was nearer to the limbus than that in exotropia (5.39 mm) (P less than 0.01). The insertion of LR in esotropia (6.66 mm) was further from the limbus than that in exotropia (6.43 mm) (P less than 0.01). The relationships between the horizontal recti insertion and the degree of deviation and the refraction of the deviating eye were discussed. It was inferred that the position of the insertion could play a role in the etiology of strabismus.