Chalazion as a Cause of Decentration after LASIK

This report described a post-LASIK patient with a chalazion at the upper eyelid presented as decreased vision. A 32-year-old female was referred with decreased vision of the right eye for 3 weeks. She underwent bilateral uneventful LASIK for myopia correction at 3 years ago. She had 6/6.7 uncorrected vision in the right eye and 6/6.7 in the left eye after the procedure. She developed a chalazion at her right nasal upper eyelid 3 weeks prior to blurring of vision. On examination, her uncorrected vision was 6/30 in the right eye. Complete eye examination including refraction, computerized corneal topography, and pachymetry were done. With a manifest refraction of +1.5 -0.5x75, visual acuity of the right eye was 6/20 and improved to 6/6.7 with pinhole correction. Computerized corneal topography revealed decentered central flattening with nasal steeping inside the pupil margin in the right eye. The location of the chalazion of the right eye was closely compatible to the area of decentration. She was diagnosed as having acquired decentration of the central flattening zone associated with chalazion-induced topographic change in the right eye. One week after the chalazion was excised, the topographic corneal decentration disappeared, and her uncorrected vision improved to 6/6.7. In post-LASIK patients with decreased vision and topography changes during follow-up, periocular masses should be considered as a differential diagnosis. Decreased corneal thickness and rigidity after LASIK might be a predisposing factor to external compression-induced changes.

並列關鍵字

chalazion ； decentration ； refractive surgery

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