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AIM: To investigate the differences in squint angle measured by right angle prism and isosceles angle prism.METHODS: Case control study. A total of 176 cases of concomitant strabismus admitted to our hospital from June 2021 to April 2022 were selected, among which 79 cases were concomitant esotropia and 97 cases were concomitant exotropia. The squint angle of all patients was measured respectively by alternating cover right angle prism and isosceles angle prism.RESULT: For patients with concomitant esotropia, the right angle prism degree was 49.167△±13.573△ and the isosceles angle prism degree was 38.250△±10.756△ (P<0.01), with a difference of 10.917△±3.752△; the measurement of right angle prism converted to circular degree was 19.096°±2.456°, and the isosceles angle prism value was 20.847°±5.364°(P<0.05), with a difference of 2.443°±2.702°. For patients with concomitant exotropia, the right angle prism degree was 51.875△±13.567△, and the isosceles angle prism degree was 40.492△±11.753△ (P<0.01), with a difference of 11.383△±4.783△; the measurement of right angle prism converted to circular degree was 19.589°±2.521°, and the isosceles angle prism value was 21.947°±5.864°(P<0.01), with a difference of 3.200°±3.077°. There was no significant statistical difference in the differences of the two prism degree and the circular degree for concomitant esotropia and concomitant exotropia(P>0.05).CONCLUSIONS: The squint angle measured by different shaped prisms is different. The degree measured by right angle prism is larger than that by isosceles angle prism.
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@#AIM: To investigate camera-assisted measurement in evaluating the accuracy of Hirschberg Test in measuring squint angle of concomitant strabismus.<p>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.<p>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(<i>P</i><0.05), and the squint angle measured byprism cover test test was higher than that of picture Hirschberg Test method(<i>P</i><0.05), and the angle in picture Hirschberg Test method was higher than that in traditional Hirschberg Test method(<i>P</i><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(<i>P</i><0.05).There were significant differences in the deviation values of squint angle measured by traditional Hirschberg Test among the 4 examiners(<i>P</i><0.05).The deviation values of all examiners measured by traditional Hirschberg Test were higher than those by picture Hirschberg Test(<i>P</i><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(<i>P</i><0.05).<p>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.
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? AIM: To investigate the differences between synoptophore and triple prism strabismometry and its possible cause.?METHODS: There were 347 patients with horizontal concomitant strabismus involved, in which 76 patients were esotropia, 37 patients were male while 39 were female, with average age of 13. 27 ± 7. 77 years old. There were 271 patients with exotropia, 131 cases were male while 140 were female, with average age of 15. 43 ± 8. 42 years old. All the patients were examined by synoptophore and prism plus shaded strabismometry in a long distance of 6m. Datas were analyzed by SPSS 17. 0.?RESULTS:In the exotropia patients, the conversions of circular degree(°) and prism degree(△) were:1°=0. 29△ ~1. 78△, which was statistically significant with intermittent strabismus (P=0. 001). While in the esotropia patients, the conversions were:1°=2. 01△ ~2. 15△.?CONCLUSION: The diversity between the two methods is enlarged with the increase of squint angle for exotropia patients. While in esotropia patients, the diversity decreased with the increase of squint angle. Synoptophore equipped with +7. 00D, defects of the triple prism itself and proximal convergence during exam may be the reasons for the diversity.
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The use of succinylcholine chloride(Anectin(R)) prior to intubation, can cause increased contracture of ocular muscles. Therefore the authors studied the change of the squint angle under general anesthesia using pancronium bromide (Myoblock(R)) in 81 horizontal strabismus patients who had no neurologic disease and mechanical restrictions of eye movement. We used the alternative cover test and Krimsky method to measure the eye position under general anesthesia.