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Clinical observation on cyclotorsion during laser in situ keratomileusis
Author(s): 
Pages: 186-187
Year: Issue:  5
Journal: International Journal of Ophthalmology

Keyword:  cyclotorsionLASIKclinical observation;
Abstract: AIM:To measure the cyclotorsion during laser in situ keratomileusis(LASIK). METHODS: We chose 70 cases (140 eyes) myopic patients. All patients had wavefront aberration tested in sitting position in a dark room (WaveScan WaveFrontTM System, AMO) preopera-tively. During the surgeries, we used the AMO VISX S4 IR system to perform iris recognizing and to measure the cyclotorsion . All patients received the wavefront guided LASIK.RESULTS: Seventy-three eyes had clockwise cyclotorsion, and 47 eyes had anticlockwise cyclotorsion. In 74 eyes, the total torsion were less than 3°, 30 eyes had cyclotor-sion from 3° to 5°, 12 eyes had cyclotorsion from 5° to 7°, 4 eyes had cyclotorsion over 7°. In 20 eyes, the iris recognizing was unsuccessful.CONCLUSION: During the LASIK procedures, due to the change of body position and stress factors, cyclo-torsion would happen. WaveScan WaveFrontTM System and VISX S4 IR (AMO) system can measure the cyclo-torsion efficiently and correct astigmatism better.
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