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Corneal shape changes after temporal and superolateral 3.0 mm clear corneal incisions
1Department of Ophthalmology, University of Vienna, Austria.
Journal of Cataract and Refractive Surgery
|August 13, 1999
Summary
Superolateral clear corneal incisions (CCIs) cause more corneal flattening after cataract surgery than temporal CCIs. This difference in corneal shape change was significant up to three months post-operation.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Cataract Surgery
Background:
- Clear corneal incisions (CCIs) are standard in cataract surgery.
- The location of CCIs may influence postoperative corneal shape.
Purpose of the Study:
- To compare corneal topographic changes following temporal versus superolateral 3.0 mm CCIs.
- To evaluate the impact of CCI location on surgically induced corneal astigmatism.
Main Methods:
- Prospective study of 54 patients undergoing cataract surgery with foldable silicone intraocular lens implantation.
- 3.0 mm temporal CCIs in 26 eyes and superolateral CCIs in 28 eyes.
- Corneal topography assessed preoperatively and at 1 week, 1 month, and 3 months postoperatively using videokeratoscopy.
Main Results:
- Both incision types induced corneal flattening postoperatively.
- Superolateral incisions resulted in statistically significant greater corneal flattening compared to temporal incisions.
- Flattening differences reached up to 0.5 diopters at 3 months.
Conclusions:
- Superolateral 3.0 mm CCIs induce more significant corneal flattening than temporal 3.0 mm CCIs.
- Incision placement is a critical factor influencing postoperative corneal topography.