GA position of eyes
Reviewed by Fiona Rowe

The authors assessed eye position based on the corneal reflex position (Hirschberg test) using a standardised measurement on pictures taken at the preoperative evaluation and under general anaesthesia (GA) in 41 patients. The mean ocular deviation taken at the preoperative visit was 32.3±11.4 with alternate prism cover test at 40cms and 33.5±12.5 with Hirschbergs. This changed to 8.8±11.4 under GA. Ocular deviation change decreased as patient age increased. Change was positively correlated with preoperative ocular deviation. 

Determinants of ocular deviation in esotropic subjects under general anaesthesia.
Daien V, Turpin C, Lignereux F, et al.
JOURNAL OF PEDIATRIC OPHTHALMOLOGY AND STRABISMUS
2013;50:155-60.