Excimer laser refractive surgery : corneal wound ... - Helda - Helsinki.fi

5 RESULTS
5.1 STUDY I AND II (PRK and LASIK long-term follow-up)
Studies I and II measured the long-term postoperative results after PRK and LASIK.
Details on patients demographics are given in Table 4.
Table 4 Patients’ preoperative characteristic before PRK and LASIK
Demographics PRK VISX PRK Nidek LASIK VISX
Number of eyes 27 34 38
Mean follow-up 10.3±0.7 9.8±0.4 7.5 ± 0.4
Mean age (y ± SD) 28±5 28 ± 9 30 ± 6.8
Men/Women 12/15 12/22 20/18
Right/left eye 14/13 18/16 20/18
Sphere (D ± SD) -4.3 ± 1.7 -3.9 ± 1.5 -6.5 ± 1.7
Range of myopic
Sphere(D)
1.25 - 7 1.25 - 7 3.25 - 11
Cyl (D ± SD) -0.4 ± 0.4 -0.5 ± 0.6 -0.63 ± 0.5
Range of myopic
cylinder
0- 1.5 0 -2.5 0 - 2.3
MRSE (D ± SD) -4.5±1.6 -4.2±1.6 -6.8 ± 1.7
UCVA (mean ± SD) 2.8 ± 0.6 2.7 ± 0.7 2.9 ± 0.7
BCVA (mean ± SD) -0.1±0.1 0.0±0.0 0.0 ± 0.1
Efficacy:
PRK
UCVA ≤0.0 was achieved postoperatively in 74% and 62% of the eyes at three months,
and at last follow-up these values were 55% and 65% after VISX and Nidek, respectively.
UCVA ≤0.5 was achieved postoperatively in 100% of the eyes at three months and at last
follow-up in both PRK groups. MRSE within ±0.5 D was found in 85% and 59% at three
months after VISX and Nidek, respectively. At the last follow-up MRSE within ±0.5 D
was found in 48% of the VISX treated eyes and 73% of the Nidek treated eyes. Ninetythree
percent of VISX eyes and 85% of the Nidek eyes were within ±1.0 D of MRSE at
three months and 85% (both groups) were within ±1.0 D at last follow-up.
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