Surgery for esotropia 
(symmetrical medical rectus recession OR lateral rectus resection)

Amount of esotropia  (prism dioptres D)	Bilateral medial rectus recession (mm)	OR	Bilateral lateral rectus resection (mm)
15	3.0		4.0
20	3.5		5.0
25	4.0		6.0
30	4.5		7.0
35	5.0		8.0
40	5.5		9.0
50	6.0		9.0

X6.0

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Success in MRCOphth