Corneal Opacity Clinical Trial
Official title:
Optical Coherence Tomography Guided Transepithelial Phototherapeutic Keratectomy
Optical Coherence Tomography (OCT) machines are non-contact instruments that can measure the depth of scars and other causes of cloudiness in the front of the cornea. The purpose of this study is to determine whether OCT-guided settings for the lasers used for removal of corneal scars and other partial-thickness corneal defects result in improved vision in patients receiving these procedures.
Status | Recruiting |
Enrollment | 80 |
Est. completion date | December 2026 |
Est. primary completion date | December 2026 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years and older |
Eligibility | Inclusion Criteria: - Patients with vision primarily limited by superficial opacities and irregularities that could be removed by PTK while leaving at least 250 µm. Exclusion Criteria: - Inability to give informed consent - Inability to maintain stable fixation for OCT imaging - Inability to commit to required visits to complete the study - Deep corneal opacities and irregularities - Cataracts, retinal disease, glaucoma, or other eye conditions that may limit the visual outcome after surgery |
Country | Name | City | State |
---|---|---|---|
United States | Casey Eye Institute, Oregon Health & Science University | Portland | Oregon |
Lead Sponsor | Collaborator |
---|---|
Oregon Health and Science University | National Eye Institute (NEI) |
United States,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Improvement in best spectacle-corrected visual acuity (BSCVA) after PTK | The primary goal of the trial is to determine the efficacy of the OCT-guided PTK treatment of corneal opacities. During the course of the trial, we will compare the predictive accuracy of the original OCT-guided PTK planning system to the OCT topography-guided system. BSCVA will be measured in typical Snellen acuity notation as 20/xx (feet) | 12 months post-procedure | |
Secondary | Improvement in uncorrected visual acuity (UCVA), refractive error, and higher order aberrations | A second goal is to develop a more sophisticated OCT guidance system incorporating OCT topography of anterior and posterior corneal surfaces and to develop a mathematical model that relates epithelial thickness variation to corneal mean curvature. During the course of the trial, we will compare the predictive accuracy of the original OCT-guided PTK planning system to the OCT topography-guided system. UCVA will be measured in typical Snellen acuity notation as 20/xx (feet) | 12 months post-procedure |
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