Which published cohorts overlap my inputs?
This retrieves evidence from populations with overlapping reported ranges. It does not predict an individual outcome or assess candidacy.
Follow-upAll reported follow-upsProceduresPRK
9 relevant study cohorts
795 observed eyes across matching follow-ups
Percentages are results a study reported for its own patients, not a prediction for you. Where a study measured an outcome more than once, the latest matching follow-up is shown. “Not reported” means the study did not publish that number; it does not mean zero.
What do these outcomes mean?Hide what these outcomes mean
Share of checked eyes that could see 20/20 or better without glasses or contact lenses after treatment.
Share of checked eyes that landed within half a diopter of the correction the study aimed for.
Share of checked eyes that landed within one diopter of the correction the study aimed for.
Share meeting that study’s definition of dry eye; questionnaires, tests and thresholds can differ.
Share reporting rings around lights under the questions and symptom threshold used by that study.
Share reporting uncomfortable or scattered brightness under the questions and threshold used by that study.
Share reporting rays or streaks around lights under the questions and threshold used by that study.
Share of checked eyes with postoperative corneal haze under the grading threshold and observation window used by that study. Transient and persistent haze are not interchangeable.
Share of treated eyes diagnosed with infectious keratitis during the study’s observation window. Case definitions and follow-up duration may differ.
Share of treated eyes diagnosed with postoperative endophthalmitis during the study’s observation window. Exact event counts and follow-up are essential for this rare serious event.
Share diagnosed with post-surgery corneal weakening during the period that study observed its patients.
Share whose dry-eye questionnaire score fell within the range that study defined as normal; this is not automatically the inverse of a dry-eye diagnosis rate.
A questionnaire score about dry-eye symptoms and their effect on daily life; lower scores generally mean fewer symptoms.
Seconds before the tear film starts to break apart after a blink; longer times generally indicate a more stable tear film.
Millimetres of wetting on a paper strip used to assess tear production; testing protocols can differ between studies.
A patient-reported dry-eye symptom score using the questionnaire selected by that study; scales are not interchangeable.
| Cohort | 20/20+ | ±0.50 D | ±1.00 D | Dry eye | Halos | Glare | Starbursts | Haze | Keratitis | Endophthalmitis | Ectasia |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PRK · ALLEGRETTO WAVE EYE-QFDA pivotal clinical study of PRK with the ALLEGRETTO WAVE EYE-Q (2016)320 eyes · 3 months, 6 months, 12 months · filter match | 94.5%294 of 311 eyes · reported at/by 12 months | 94.5%294 of 311 eyes · reported at/by 12 months | 99.4%309 of 311 eyes · reported at/by 12 months | not reported | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
| PRKTen-year follow-up of photorefractive keratectomy for myopia of less than -6 diopters (2008)225 eyes · 10 years · filter match | not reported | not reported | 75.0%169 of 225 eyes · reported at/by 10 years | not reported | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
| PRKSingle-Step Transepithelial PRK vs Alcohol-Assisted PRK in Myopia and Compound Myopic Astigmatism Correction (2016)103 eyes · 3 months · filter match | 94.0%90 eyes assessed · reported at/by 3 months | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
| PRKTwelve-Month Outcomes of Wavefront-Optimized PRK for High Myopic Correction Compared with Low-to-Moderate Myopia (2021)40 eyes · 12 months · filter match | 97.5%39 of 40 eyes · reported at/by 12 months | not reported | 100.0%40 of 40 eyes · reported at/by 12 months | not reported | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
| PRKTransepithelial Versus Conventional PRK: A Randomized Controlled Study (2025)35 eyes · 3 months · filter match | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
| PRKTransepithelial Versus Epithelium-off Photorefractive Keratectomy in High Compound Myopic Astigmatism (2024)30 eyes · 6 months · filter match | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
| PRKTwelve-Month Outcomes of Wavefront-Optimized PRK for High Myopic Correction Compared with Low-to-Moderate Myopia (2021)29 eyes · 12 months · filter match | 89.7%26 of 29 eyes · reported at/by 12 months | not reported | 100.0%29 of 29 eyes · reported at/by 12 months | not reported | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
| PRK · AMARISSingle-Step Transepithelial ASLA (SCHWIND) With Mitomycin-C for the Correction of High Myopia: Long-Term Follow-Up (2015)29 eyes · 12 months · filter match | not reported | 85.7%29 eyes assessed · reported at/by 12 months | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
| PRKChronic dry eye in photorefractive keratectomy and laser in situ keratomileusis: Manifestations, incidence, and predictive factors (2015)Eyes not reported · 12 months · filter match | not reported | not reported | not reported | 5.0%Denominator not reported · reported at/by 12 months | not reported | not reported | not reported | not reported | not reported | not applicable | not reported |
Scroll sideways inside the table to see every outcome. “Not applicable” reflects the procedure type. Italic “not reported” means the publication did not provide that result; it does not mean zero events.