Surgery for esotropia 
(monocular resect/recess)
Amount of esotropia 
(prism dioptres D)
Medial rectus recession
(mm)
Lateral rectus resection
(mm)
15
3.0
4
20
3.5
5
25
4.0
6
30
4.5
7
35
5.0
8
40
5.5
9
50
6.0
10
60
7.0
10
X
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