ArticleAdvances in ophthalmology practice and research
Early postoperative changes in corneal densitometry after SMILE with 120-μm and 130-μm cap thickness: a comparative study.
Article in Advances in ophthalmology practice and research. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: To compare early postoperative changes in corneal densitometry after small incision lenticule extraction using 120-μm and 130-μm cap thicknesses. Methods: 69 eyes of 39 patients who underwent small incision lenticule extraction (SMILE) with cap thicknesses of 120-μm (n = 34) and 130-μm (n = 35) were included in this study. The corneal densitometry (CD) of three zones (0-2 mm, 2-6 mm, and 6-10 mm) of the anterior, central, and posterior corneal layers was evaluated before, one week, and one month after surgery. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), spherical degree, cylinder degree, and spherical equivalent (SE) were also analyzed and compared between the two groups before and after surgery. Results: Little difference was detected between the two groups in postoperative UCVA, BCVA, SE, and cylinder degree at one month. No statistically significant differences were found between the preoperative and postoperative CD values for the overall (0-12 mm) cornea and the 6-10 mm zone in either group. A significant increase in CD was observed in the 0-2 mm and 2-6 mm zones of the anterior layer in the 120-μm group, and the 0-2 mm zone of the central layer in the 130-μm group, one week postoperatively. These changes persisted for one month after surgery ( Conclusions: CD increased mainly in the 0-6 mm zone of the anterior layer in the early phase after the SMILE procedure with both the 120-μm and 130-μm groups. The increase in CD in the anterior 2-6 mm zone one week postoperatively was higher in the 120-μm group than in the 130-μm group. SMILE with 120-μm and 130-μm cap thickness were both efficient and safe, but eyes with a 120-μm cap thickness showed higher postoperative corneal wavefront aberrations.
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