Simultaneous Transepithelial Topography-Guided Photorefractive Keratectomy and Accelerated Cross-Linking in Keratoconus: 2-Year Follow-Up

Table 4

Visual acuity and manifest refraction during follow-up.

	Preoperative	1 month	3 months	6 months	12 months	24 months
UDVA (logMAR)
Mean±SD	0.77 ± 0.40	0.55 ± 0.31	0.49 ± 0.28	0.48 ± 0.28	0.48 ± 0.33	0.42 ± 0.29
Median	0.70	0.52	0.52	0.52	0.40	0.40
Min/Max	0.15/1.30	0.10/1.30	0.00/1.30	0.00/1.30	0.00/1.30	0.00/1.00
p value (preop)	-	<0.001	<0.001	<0.001	<0.001	<0.001
p value (previous)	-	-	0.033	0.475	0.687	0.042
CDVA (logMAR)
Mean±SD	0.36 ± 0.23	0.31 ± 0.27	0.27 ± 0.24	0.26 ± 0.23	0.21 ± 0.21	0.20 ± 0.21
Median	0.40	0.22	0.22	0.22	0.15	0.15
Min/Max	0.00/1.00	0.00/1.00	0.00/1.00	0.00/1.00	0.00/1.00	0.00/1.00
p value (preop)	-	0.125	0.013	0.007	<0.001	<0.001
p value (previous)	-	-	0.010	0.100	0.003	0.067
MRSE (D)
Mean±SD	−3.78±3.26	−1.69±1.82	−1.41±2.20	−1.42±2.00	−1.42±1.84	−1.39±1.82
Median	−3.31	−1.19	−1.06	−1.00	−1.25	−1.25
Min/Max	−12.63/0.25	−8.25/1.38	−8.25/1.38	−8.25/1.38	−5.50/1.38	−5.50/1.38
p value (preoperative)	-	<0.001	<0.001	<0.001	<0.001	<0.001
p value (previous)	-	-	0.115	0.537	0.871	0.465

SD: standard deviation; min: minimum; max: maximum; UDVA: uncorrected distance visual acuity; CDVA: corrected distance visual acuity; MRSE: spherical equivalent of manifest refraction.
: compared to preoperative visit.
: compared to previous visit.