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H. Ku, M.–Y. Kim, H.–S. Kim, Y.–C. Lee; Change of Ocular Position in Normal and Strabismic Patients Under General Anesthesia . Invest. Ophthalmol. Vis. Sci. 2004;45(13):2552.
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Purpose:We investigated a change of ocular position between eye position in the awake state and surgical plane of general anesthesia in normal and strabismic patients Methods: We studied 105 patients and divided them into 5 groups (normal, esotropia, exophoria, exotropia(≤30PD), exotropia(>30PD). We photographed patient’s eyes at primary position (50 cm distance) with digital camera before and after general anesthesia and measured the change of eye position using corneal reflex and medial limbus Results:All patients showed divergence under anesthesia except exotropia(>30PD) group. Amount of divergence was 27.4±8.1PD in normal group, 39.7±8PD in esotropia group, 36.6±11.7PD in exophoria group, 11.1±10.2PD in exotropia(≤30PD) group respectively, but exotropia(>30PD) group showed convergence of 11±6.5PD In esotropia group, change of eye position of fixing and non–fixing eye after anesthesia showed divergence of 20.0±4.8PD and 31.8±8.9PD, resulting divergent position of 14.4±4.8PD in fixing eye and 14.1±4.8 in non–fixing eyeIn exotropia group, change of eye position of fixing and non–fixing eye after anesthesia showed divergence of 17.3±5.7PD and convergence of 16.1±6.5PD, resulting divergent position of 19±2.1PD in fixing eye and 18.2±6.4 in non–fixing eye Conclusions: All groups except exotropia(>30PD) group demonstrated divergence under general anesthesia regardless of presence or type of strabismus. However eye position in all groups under general anesthesia was within 25–35 PD of divergent position and we could not distinguish fixing eye from non–fixing eye from eye position under general anesthesia
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