Refractive Outcomes of Photorefractive Keratectomy (PRK) and Small Incision Lenticule Extraction (SMILE) in low myopia Chulalongkorn Hospital Thailand

Refractive Outcomes and HOA of Photorefractive Keratectomy (PRK) and Small Incision Lenticule Extraction (SMILE) in low myopia : Propensity score matching,Retrospective Cohort study

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20190827003

Enrollment

164

Registered

2019-08-27

Start date

2015-04-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Myopia&#44

Interventions

The patients who were Photorefractive Keratectomy(PRK) surgery at Chulalongkorn hospital between April 2016 &#45

September 2018 ,The patients who were Small Incision Lenticule Extraction (SMILE) surgery at Chulalongkorn hospital between April 2016 &#45

September 2018

Treatment,Treatment

Photorefractive Keratectomy (PRK),Small Incision Lenticule Extraction (SMILE)

Eligibility

Sex/Gender

All

Age

18 Years to 60 Years

Inclusion criteria

Inclusion criteria: 1. Patients who had myopia between -0.50 to -6.00 diopter and astigmatism below -2.00 diopter 2. Age over 18 years 3. Good compliance and complete follow-up visits in one year 4. Medical Records completed

Exclusion criteria

Exclusion criteria: 1.Patients had severe eye disease 2.Patients had an eye trauma history 3.Patients had corneal disease 4.Patients had used eye medication both pill and eye drop 5.Patients who lost follow up before 1 year

Design outcomes

Primary

Measure	Time frame
Efficacy At 1week, 1month,3month,6month,12month after end of the intervention Ratio of Uncorrected Distance Visual Acuity (UDVA) after surgery and Corrected Distance Visual Acuit,Predictability At 1week, 1month,3month,6month,12month after end of the intervention Different of Achieved Refractive Spherical Equivalent and Attempt Refractive Spherical Equivalent ,Safety At 1week, 1month,3month,6month,12month after end of the intervention Ratio of Corrected Distance Visual Acuity(CDVA) after surgery and CDVA before Surgery,Stability At 1week, 1month,3month,6month,12month after end of the intervention Change of Spherical Equivalent at each time point	—

Measure

Time frame

Efficacy At 1week, 1month,3month,6month,12month after end of the intervention Ratio of Uncorrected Distance Visual Acuity (UDVA) after surgery and Corrected Distance Visual Acuit,Predictability At 1week, 1month,3month,6month,12month after end of the intervention Different of Achieved Refractive Spherical Equivalent and Attempt Refractive Spherical Equivalent ,Safety At 1week, 1month,3month,6month,12month after end of the intervention Ratio of Corrected Distance Visual Acuity(CDVA) after surgery and CDVA before Surgery,Stability At 1week, 1month,3month,6month,12month after end of the intervention Change of Spherical Equivalent at each time point

—

Secondary

Measure	Time frame
Higher order aberration At 1week, 1month,3month,6month,12month after end of the intervention WASCA Aberrometry	—

Countries

Thailand

Contacts

Public ContactPatchima Chantaren

Faculty of medicine, Chulalongkorn University

patchimac@gmail.com+66819331080

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026