Fig. 4 Postoperative refractive outcomes
a: Uncorrected distance visual acuity. b : Uncorrected
distance visual acuity versus corrected distance visual
acuity. c : Spherical equivalent refraction accuracy. d :
Postoperative refractive cylinder (n=30 eyes in each group).
CDVA = corrected distance visual acuity; FPR = first Purkinje reflex; PC
= pupil center; UDVA = uncorrected distance visual acuity.
For the Evaluation of Posterior Capsular Opacification (EPCO) analysis,
based on picture quality, there were 60 eyes (of 30 patients) available
at 3-years of follow up. The mean PCO score of the EPCO analysis
was 0.338±0.243 (range: 0.000 to 0.690) for the PC group and 0.347±0.230
(range: 0.000 to 0.720) for the FPR group, reflecting no
statistical difference between them (mean diff.: -0.009±0.142, 95%:
-0.060 to -0.041; p=0.725). Seven eyes (23.3%) of the PC group and 6
eyes (20%) of the FPR group did not display any signs of PCO, whereas
23 of the PC eyes (76.7%) and 24 of the FPR eyes (80%) displayed an
EPCO score from > 0 to 1 (none to minimal).
Regarding aberrometry data, a statistically significant difference was
found between groups for internal high-order (HOAs) aberrations (mean
diff.: 0.016±0.023 µm, 95% CI: 0.008 to 0.024; p<0.01) and
for total internal root-mean-square (RMS) aberrations (mean diff.:
0.007±0.008 µm, 95% CI: 0.004 to 0.009; p<0.01), with higher
values in the PC group; comparison of low-order aberrations (LOAs)
between groups showed no statistically significant difference (mean
diff.: 0.004±0.010 µm, 95% CI: 0.000 to 0.007; p= 0.073).
A positive significant but weak correlation (p value<0.05;
R2<0.05) was found between distance from the
IOL center to the visual axis (IOLC-FPR) and internal (HOAs and LOAs)
RMS in the total eye population (p<0.001;
R2=0.38) (Figure 5).