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  • Reduced angle after BT for postop diplopia test

Reduced angle after BT for postop diplopia test
Reviewed by Fiona Rowe

1 August 2014 | Fiona Rowe (Prof) | EYE - Paediatrics, EYE - Strabismus

The authors undertook a retrospective study to evaluate the extent of reduced deviation after Botulinum toxin (BT) when used as a postoperative diplopia test. They evaluated effect in 39 patients: 32 exotropia and seven esotropia. The same BT dose was used for all – five units in 0.1ml saline. The median preoperative angle was 40PD (16-78) at near and 40PD (12-77) for distance. The preoperative assessment for follow-up surgery was at a mean of seven months (4-16) after BT injection. Reduced angle of deviation of 15PD or more at either near or distance fixation was noted in 36% of patients. This altered the planned surgery for four cases with a change from 3-muscle to 2-muscle surgery. Reduction was more common for exotropia than esotropia.

Botulinum toxin as a postoperative diplopia test – it can also reduce the angle of deviation prior to surgery.
Ockrim Z, Weir CR, Yim JL, Cleary M.
STRABISMUS
2013;21(4):199-202.
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Fiona Rowe (Prof)
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Fiona Rowe (Prof)

Institute of Population Health, University of Liverpool, UK.

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