Cochrane · systematic review · CD009799
Laser‐assisted subepithelial keratectomy (LASEK) versus photorefractive keratectomy (PRK) for correction of myopia
Li, SM, Zhan, S, Li, SY, et al. · Cochrane Database of Systematic Reviews · 2016 · Cochrane Library
Eyes and VisionAMSTAR 2: not assessed
SoF tableOnly the outcomes this review put in its Summary of Findings table are listed (the Cochrane Handbook caps them at about seven per comparison). Its other analyses are not shown here.
Questions
6
current version
GRADE rated
6
No studies
0
Included studies
NR
No studies 0 · 0%Ungraded 0 · 0%Very low 3 · 50%Low 2 · 33.3%Moderate 1 · 16.7%High 0 · 0%
Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.
Questions and results
Comparison
Population: adult participants (≥ 18 years) with myopia
| Outcome | Effect | Evidence | Status / GRADE |
|---|---|---|---|
UCVA of 20/20 or better at 12 months post treatment | RR 0.98 [0.92, 1.05] | NR | Low Downgraded: imprecision, inconsistency |
Within ± 0.50 D of target refraction at 12 months post treatment | RR 0.93 [0.84, 1.03] | NR | Low Downgraded: imprecision, inconsistency |
Loss of 1 or more lines of BSCVA at 12 months post treatment | RR 3 [0.13, 71.96] | NR | Very low Downgraded: imprecision, inconsistency |
Mean spherical equivalent at 12 months post treatment | no estimate extracted | NR | Moderate Downgraded: imprecision, inconsistency |
Adverse outcomes ‐ corneal haze score at 12 months (grade 1.0 ‐ more prominent haze that does not interfere with visibility of fine iris details; grade 2.0 ‐ mild obscuration of iris details; grade 3.0 ‐ moderate obscuration of iris and lens; and ... | no estimate extracted | NR | Very low Downgraded: imprecision, inconsistency |
Adverse outcomes ‐ glare and halo scores at 3 months (grade 0 ‐ none; grade 1 ‐ very low; grade 2 ‐ low; grade 3 ‐ moderate; grade 4 ‐ high; and grade 5 ‐ very high) | no estimate extracted | NR | Very low Downgraded: imprecision, inconsistency |