Safety and Effectiveness of the PXL Platinum 330 System for Corneal Collagen Cross-Linking in Eyes With Corneal Thinning Position
Keratoconus, Unstable, Ectasia Corneal, Bacterial Keratitis
About this trial
This is an interventional treatment trial for Keratoconus, Unstable
Eligibility Criteria
Inclusion Criteria:Criterion 1,2,3 are required for all participants. Participants must also meet one or more of criteria 4-12. Criteria 13 is only relevant for contact lens wearers.
- 12 years of age or older
- Signed written informed consent
- Willingness and ability to comply with schedule for follow-up visits
- Presence of central or inferior steepening
- Axial topography consistent with keratoconus, post-surgical ectasia, or pellucid marginal degeneration
Presence of one or more findings associated with keratoconus or pellucid marginal degeneration, such as
- Fleisher ring
- Vogt's striae
- Decentered corneal apex
- Munson's sign
- Rizzutti's sign
- Apical corneal scarring consistent with Bowman's breaks
- Scissoring of the retinoscopic reflex
- Crab-claw appearance on topography
- Steepest keratometry (Kmax) value greater than or equal to 47.2
- I-S keratometry difference < 1.5 D on the Pentacam map or topography map
- Posterior corneal elevation > 16 microns
- Thinnest corneal point <485 microns
- Predicted Post LASIK/PRK stromal ablation depth <350 microns or expected keratometry >47.2, or patients undergoing PRK/SMILE in keratoconus suspect eyes
- Bacterial or fungal keratitis persistent and not responding despite > 2 weeks of standard antimicrobial therapy or with rapid progression of corneal thinning, with loss of >25% corneal thickness
Contact lens wearers only:
- Removal of contact lenses for the require period of time prior to the screening refraction:
Contact Lens Type Discontinuations Time: Soft, 1 week; Soft Extended Wear, 2 weeks; Soft Toric, 3 weeks; Rigid Gas Permeable, 2 weeks per decade of wear -
Exclusion Criteria:
- Eyes classified as normal or atypical normal on the severity grading scheme
- Corneal pachymetry at the screening exam that is <300 microns at the the thinnest point in the eye(s) to be treated.
Previous ocular condition (other than refractive error) in the eye(s) to be treated that may predispose the eye for future complications, for example:
- History of or active corneal disease (e.g. herpes simplex, herpes zoster keratitis, recurrent erosion syndrome, acanthamoeba, etc.)
- Clinically significant corneal scarring the CXL treatment zone that is not related to keratoconus or, in the investigator's opinion, will interfere with the cross-linking procedure.
- Pregnancy (including plan to become pregnant) or lactation during the course of the study
- A known sensitivity to the study medications
- Patients with nystagmus or any other condition that would prevent a steady gaze during the CXL treatment of diagnostic tests.
Patients with a current condition that, in the physician's opinion, wold interfere with or prolong epithelial healing.
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Sites / Locations
- Eye Specialists of IndianaRecruiting
Arms of the Study
Arm 1
Arm 2
Experimental
Active Comparator
Pulsed Accelerated
Conventional
30mW, 5 sec, 5 sec off, 10 minutes of illumination. Combination Product: PXL-330 Platinum device for cross linking with Peschke riboflavin solution will be used to load the cornea followed by UV-A cross linking of the cornea
9mW continuous, 10 minutes of illumination. Combination Product: PXL-330 Platinum device for cross linking with Peschke riboflavin solution will be used to load the cornea followed by UV-A cross linking of the cornea