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.
Study Type
OBSERVATIONAL
Enrollment
44
corneal tomography scans of the two corneal surfaces were obtained preoperatively and postoperatively with a rotating Scheimpflug imaging system
Assiut Faculty of Medicine
Asyut, Egypt
RECRUITINGThe percentage of changes of anterior corneal surface preoperatively compared to those values postoperativaly
The changes of anterior corneal surface including flat (K1) and steep (K2) keratometry values, corneal astigmatism (Astig) preoperatively compared to those values postoperativaly
Time frame: 1 month
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