Conventional and transepithelial PRK

Not Applicable

Recruiting

Conditions: Corneal epithelium debridement in Photorefractive keratectomy.
Other corneal scars and opacities
H17.8

Registration Number: IRCT20200317046804N1

Lead Sponsor: oor Eye Hospital

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Recruiting

Sex: All

Target Recruitment: 60

Inclusion Criteria

Equivalent sphere at least -2.00 diopter with astigmatism up to -4.00 diopter and myopia up to -8.00 diopter.
The stability of refraction for at least one year before surgery.
Corrected visual acuity more than 20/30.
Contact lens use should be discontinued at least 3 weeks prior to surgery.
age between 18 to 50 years

Exclusion Criteria

Any ocular pathology including corneal dystrophy, keratoconus or keratoconus suspect and glaucoma or glaucoma suspect.
The history of diabetes and autoimmune diseases.
The history of any previous ocular surgery.

Study & Design

Study Type: interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Corneal epithelial defect size. Timepoint: Day of operation and consecutive days after surgery until complete healing of corneal epithelial defect (at least 3 and up to 7 days). Method of measurement: Using photoslit.

Secondary Outcome Measures

Name	Time	Method
Severity of patient's pain and discomfort due to corneal epithelial defect. Timepoint: Consecutive days after surgery until complete healing of corneal epithelial defect (at least 3 and up to 7 days). Method of measurement: 11-Point numeric scale of pain Questionnaire and Eye sensation scale Questionnaire.;Non-corrected and corrected VA. Timepoint: Preoperation and 3 month after operation. Method of measurement: Snellen Chart.;Refraction. Timepoint: Preoperation and 3 month after operation. Method of measurement: Autorefractometer.