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KMID : 0213520180320020095
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Korean Journal of Ophthalmology
2018 Volume.32 No. 2 p.95 ~ p.102
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Lamina Cribrosa Changes after Laser In Situ Keratomileusis in Myopic Eyes
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Lee Soo-Min
Choi Da-Ye
Lim Dong-Hui
Chung Tae-Young
Han Jong-Chul
Kee Chang-Won
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Abstract
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Purpose: To determine deep optic nerve head structure changes after transient intraocular pressure elevation during laser in situ keratomileusis (LASIK) for myopia.
Methods: Enhanced depth imaging-optical coherence tomography was performed in each myopic eye that underwent LASIK surgery. Enhanced depth imaging-optical coherence tomography images were created at postoperative 1 day, 1 week, 2 weeks, and 1 month. Lamina cribrosa (LC) thickness, LC depth and prelaminar thickness at the superior, middle and inferior portions of the optic nerve head were measured by two investigators.
Results: Forty eyes in 40 patients were included in the present study. During follow-up, there were no significant differences in prelaminar thickness or LC depth. The LC demonstrated increased thickness at postoperative 1 day at all three locations (superior, middle, and inferior) (p < 0.001, p < 0.001, p < 0.001, respectively). However, no significant changes were observed at postoperative 1 week, 2 weeks, and 1 month.
Conclusions; The LC thickness could increase at 1 day after LASIK surgery. However, the thickness will gradually return to baseline morphology. Temporary intraocular pressure increase during LASIK does not appear to induce irreversible LC thickness changes.
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KEYWORD
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Lamina cribrosa, Laser in situ keratomileusis, Optic disk
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