AIM: To investigate camera-assisted measurement in evaluating the accuracy of Hirschberg Test in measuring squint angle of concomitant strabismus.

METHODS:The clinical data of 105 patients with concomitant strabismus who were admitted to the hospital during the period from January 2016 to January 2018 were collected. After admission, they were given traditional Hirschberg Test and picture Hirschberg Test for squint angle examination.Taking the prism cover test as golden standard, the deviation values between squint angle measured by golden standard and those measured by the traditional Hirschberg Test and the picture Hirschberg Test were recorded.The influence of Kappa angle on the deviation value was analyzed.The application value of camera-assisted measurement in squint angle of concomitant strabismus was analyzed.

RESULTS:There was a significant difference in the value of squint angle measured by traditional Hirschberg Test, picture Hirschberg Test and prism cover test test(P<0.05), and the squint angle measured byprism cover test test was higher than that of picture Hirschberg Test method(P<0.05), and the angle in picture Hirschberg Test method was higher than that in traditional Hirschberg Test method(P<0.05), and the consistency of picture Hirschberg Test method and prism cover test test in measuring squint angle was higher than that of Traditional Hirschberg Test method(P<0.05).There were significant differences in the deviation values of squint angle measured by traditional Hirschberg Test among the 4 examiners(P<0.05).The deviation values of all examiners measured by traditional Hirschberg Test were higher than those by picture Hirschberg Test(P<0.05).The deviation degree of picture Hirschberg Test was lower than that of traditional Hirschberg Test in terms of the examination of squint angle in patients with positive and negative Kappa angle(P<0.05).

CONCLUSION: The deviation of camera-assisted measurement picture Hirschberg Test is lower than that of traditional Hirschberg Test for the measurement of squint angle of concomitant strabismus, and it is more suitable for young patients who cannot cooperate with.