Early Changes in Visual Quality and Corneal Structure after DMEK: Does DMEK Approach Optical Quality of a Healthy Cornea?
Table 2
Visual quality parameters as obtained with Oculus Pentacam of corneas undergoing Descemet membrane endothelial keratoplasty (DMEK) measured preoperative and at 1 month and at 6 months postoperative.
Quality parameter
Preoperative
1 month postoperative
P (preoperative vs 1 month postoperative)
6 months postoperative
P (1 month vs 6 months postoperative)
Anterior cornea
Central density
39.81 (10.99)
33.60 (13.87)
0.069
24.32 (2.92)
0.006
0–2 mm density
43.83 (10.50)
35.60 (12.16)
0.045
25.21 (5.40)
0.035
Total density
41.06 (10.43)
38.40 (10.03)
0.489
29.25 (6.52)
0.029
Km
43.83 (2.03)
43.13 (1.86)
0.281
42.85 (1.50)
0.607
RMS HOA (µm)
1.19 (0.52)
1.66 (0.79)
0.249
1.50 (1.11)
0.317
RMS LOA (µm)
3.36 (1.23)
4.73 (1.67)
0.026
3.86 (2.24)
0.427
RMS total (µm)
3.60 (1.28)
5.04 (1.77)
0.022
4.39 (2.23)
0.522
Posterior cornea
0–2 mm density
27.70 (4.20)
22.07 (7.45)
0.006
17.60 (2.83)
0.010
Total density
29.06 (4.56)
26.26 (5.44)
0.214
23.38 (3.52)
0.128
Km
−5.84 (0.23)
−6.80 (0.67)
0.005
−6.52 (0.39)
0.217
RMS HOA (µm)
0.69 (0.34)
0.69 (0.26)
0.828
0.47 (0.13)
0.015
RMS LOA (µm)
1.71 (1.08)
1.54 (0.56)
0.870
1.04 (0.29)
0.020
RMS total (µm)
1.86 (1.11)
1.71 (0.57)
0.703
1.15 (0.29)
0.015
Bold letters indicate . Asterisk marks Bonferroni values <0.007. DMEK, Descemet membrane endothelial keratoplasty; Km, mean keratometry; RMS, root mean square; HOA, high-order aberrations; LOA, low-order aberrations; µm, microns.
