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Impact of Corneal Higher-Order Aberrations on Visual Acuity After Deep Anterior Lamellar Keratoplasty in Treating Keratoconus

Suzuki, Natsume M.D.; Yamaguchi, Takefumi M.D.; Tomida, Daisuke M.D., Ph.D.; Tsubota, Kazuo M.D., Ph.D.; Shimazaki, Jun M.D., Ph.D.

doi: 10.1097/ICL.0000000000000561
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Purpose: To evaluate the incidence of the Descemet membrane (DM) folds after deep anterior lamellar keratoplasty (DALK) in treating keratoconus. We also evaluated the influence of DM folds and corneal higher-order aberrations (HOAs) on visual acuity after DALK.

Methods: This retrospective study included 89 consecutive eyes of 87 patients who underwent DALK for the treatment of keratoconus at Tokyo Dental College Ichikawa General Hospital from April 2002 to June 2017. The presence or absence of DM folds was determined by slitlamp microscopy. Visual acuity after DALK was compared between the eyes with and without DM folds. Corneal HOAs of the anterior and posterior surfaces and the total cornea were measured by anterior segment optical coherence tomography. Correlations among the presence of DM folds, corneal HOAs, and visual acuity were analyzed.

Results: The Descemet membrane folds developed in 28.1% (25/89) eyes after DALK for the treatment of keratoconus. However, there were no significant differences in postoperative visual acuity between the eyes with and without DM folds at 1, 3, 6, and 12 months (P=0.739, P=0.106, P=0.223, and P=0.186, respectively). The visual acuity at 12 months was significantly correlated with corneal HOAs within a 4-mm diameter (anterior surface: R=0.546, P=0.003; total cornea: R=0.506, P=0.007).

Conclusions: Larger corneal HOAs, but not the presence of DM folds, were associated with poor visual acuity after DALK. In treating advanced keratoconus with DALK, it is important to minimize postoperative corneal HOAs, although DALK improves visual acuity by reducing HOAs due to keratoconus.

Department of Ophthalmology (N.S., T.Y., D.T., K.T., J.S.), Tokyo Dental College, Ichikawa General Hospital, Chiba, Japan; and Department of Ophthalmology (N.S., T.Y., K.T., J.S.), Keio University School of Medicine, Tokyo, Japan.

Address correspondence to Takefumi Yamaguchi, M.D., Department of Ophthalmology, Tokyo Dental College, Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa, Chiba 272-8513, Japan; e-mail: tym.i.eye.i@gmail.com

The authors have no funding or conflicts of interest to disclose.

Presented at ARVO 2018, April 30, 2018, Honolulu, Hawaii.

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All authors certify that they have no involvement with any entity or organization with any financial interest in the subject matter or materials discussed in the manuscript.

Accepted September 24, 2018

© 2019 Contact Lens Association of Ophthalmologists, Inc.