Femtosecond laser-assisted intrastromal corneal ring segment implantation for the treatment of high astigmatism correction in keratoconus, in corneal ectasia after refractive surgery and after penetrating keratoplasty in Chulalongkorn Memorial Hospital, 1-year results.
Not Applicable
Recruiting
- Conditions
- -Keratoconus-ectasia after refractive surgery-high astigmatism after penetrating keratoplasty
- Registration Number
- TCTR20170111001
- Lead Sponsor
- none
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Recruiting
- Sex
- All
- Target Recruitment
- 80
Inclusion Criteria
- Keratoconus
- ectasia after refractive surgery
- high astigmatism after penetrating keratoplasty
These patients could not tolerate glasses or contact lens for refractive correction, so they underwent femtosecond laser-assisted intrastromal corneal ring segment implantation. They had been followed for at least 1 year postoperatively. They must also have corneal topography from pentacam at 1 year.
Exclusion Criteria
Patients as stated in the inclusion criteria but had no information about corneal topography from pentacam
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method uncorrected and best corrected visual acuity 1 year snellen chart,keratometric power 1 year diopter,spherical equivalent and manifest refraction 1 year minus cylinder form,Q value 1 year Pentacam measurement,Q value Pentacam measurement,thinnest point of corneal thickness 1 year Pentacam measurement
- Secondary Outcome Measures
Name Time Method efficacy of intrastromal corneal ring segment for each type of keratoconus 1 year comparison of primary outcome