Abstract
Purpose :
To measure and analyze angles of ocular deviations between dominant and non-dominant eye using VOG with alternate cover
Methods :
Fifteen subjects with intermittent exotropia were included. The subjects were asked to fixate on a black-on-white optotype at 1 m, which subtended a visual angle of 50 min of arc, equating to a Snellen optotype of 20/200. The video files and data about ocular deviations were obtained using VOG with alternate cover test. We analyzed angles of ocular deviations in dominant and non-dominant eyes. Additionally, we compared with values of VOG and deviation angles of the alternative prism cover test.
Results :
Among the 15 subjects in this study, the mean age was 7.73(rang, 4-10 years). Seven of 15 subjects have right eye dominance. Ten of the 15 subjects were men. There was no significant difference of ocular deviations between dominant and non-dominant eye in VOG. (P=0.40)
Conclusions :
VOG has the advantage of measuring the angle of ocular deviation in both eyes at the same time. We have measured deviation angles mainly in non-dominant eye for surgery using alternative prism cover test. In this study, there is no significant difference of ocular deviations between dominant and non-dominant eye with VOG. Therefore, It seems not to be problem for strabismus surgery even if alternate prism cover test is performed in any eye.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.