Pentacam Findings After Implantation of Intrastromal Corneal Rings in Keratoconus.
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Keratoconus
- Sponsor
- Assiut University
- Enrollment
- 44
- Locations
- 1
- Primary Endpoint
- The percentage of changes of anterior corneal surface preoperatively compared to those values postoperativaly
- Last Updated
- 3 years ago
Overview
Brief Summary
keratoconus is a progressive corneal ectatic disease characterized by paraxial stromal thinning and weakening, resulting in irregular astigmatism, corneal protrusion, and distortion of the anterior corneal surface. It is usually bilateral, although asymmetrical in most cases.
Intrastromal corneal rings are polymethylmethacrylate devices successfully used for the management of keratoconus, pellucid marginal degeneration, post-LASIK ectasia and myopia. Intrastromal corneal rings implantation is safe and reversible procedure that does not affect the central corneal area, and hence, avoids interference with visual axis. The goal of intrastromal corneal rings implantation is to improve visual acuity by regulariztion of the anterior corneal surface.
Investigators
Ahmed Mohamed Abbas
Principal investigator
Assiut University
Eligibility Criteria
Inclusion Criteria
- •Keratoconus grade I, II and III according to the mean K Amsler-Krumeich classification.
- •Contact lens intolerance.
- •Thinnest location is more than 400 um.
- •Maximum keratometry (Kmax) between 48 and 64 D.
- •Clear cornea with no Vogt's striae.
Exclusion Criteria
- •Previous corneal surgery.
- •Grade IV with corneal scarring.
- •Concurrent corneal disease in addition to KC.
- •Autoimmune or systemic connective tissue diseases.
Outcomes
Primary Outcomes
The percentage of changes of anterior corneal surface preoperatively compared to those values postoperativaly
Time Frame: 1 month
The changes of anterior corneal surface including flat (K1) and steep (K2) keratometry values, corneal astigmatism (Astig) preoperatively compared to those values postoperativaly