Evaluation of Anterior and Posterior Corneal Irregularity After Descemet Membrane Endothelial Keratoplasty.

Abstract:

PURPOSE:To investigate the changes in anterior and posterior corneal irregularity after Descemet membrane endothelial keratoplasty (DMEK). METHODS:This retrospective study included 27 eyes of 23 patients who underwent DMEK and 27 eyes of age-matched healthy controls. Corneal irregularity indexes, surface regularity of height (SR_H), and higher-order aberrations were evaluated in 4- and 6-mm diameters of the cornea, preoperatively and postoperatively, using anterior segment optical coherence tomography. RESULTS:The best spectacle-corrected visual acuity (logarithm of the minimum angle of resolution) improved from 1.01 ± 0.54 preoperatively to 0.08 ± 0.11 at 6 months postoperatively. Anterior SR_H was significantly lower at 6 months postoperatively [from 1.86 ± 0.73 to 1.20 ± 0.34 (P < 0.01) (4-mm) and from 2.29 ± 0.62 to 1.64 ± 0.42 (P < 0.01) (6-mm)]. Posterior SR_H showed a significant decrease from 6.87 ± 4.19 to 2.18 ± 0.51 (4-mm) and from 5.21 ± 2.60 to 2.44 ± 0.38 (6-mm) at 6 months postoperatively (P < 0.001). The SR_H was positively correlated with best spectacle-corrected visual acuity (anterior 4 mm: R = 0.524; anterior 6 mm: R = 0.477; posterior 4 mm: R = 0.655; posterior 6 mm: R = 0.655, P < 0.001) and with higher-order aberrations for 4-mm and 6-mm diameters (R = 0.511 and R = 0.325, P < 0.001, respectively). CONCLUSIONS:The SR_H reflects corneal irregularity and is correlated with the visual outcome after DMEK, which may be very helpful to corneal surgeons as an index indicating the severity before DMEK, and the quality of visual function after DMEK.

journal_name

Cornea

journal_title

Cornea

authors

Oyakawa I,Hayashi T,Kobashigawa Y,Matsuzawa A,Takahashi H,Kato N

doi

10.1097/ICO.0000000000001722

subject

Has Abstract

pub_date

2018-11-01 00:00:00

pages

1360-1365

issue

11

eissn

0277-3740

issn

1536-4798

journal_volume

37

pub_type

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