Biaxial Lens Extraction Combined With Scleral Frown Incision for Nonastigmatism Refractive Cataract Surgery
Purpose
To compare the amount of induced astigmatism after cataract surgery with clear cornea microcoaxial cataract surgery (COMICS), microbiaxial cataract surgery (BIMICS) combined with clear corneal incision for IOL implantation and BIMICS combined with scleral frown incision for IOL implantation.
Methods
One surgeon performed 50 cases of cataract surgery with each technique (2.2 mm COMICS, 0.7 mm BIMICS + clear corneal and BIMICS + 2.2 mm Scleral Frown), with a total of 150 operated eyes. Corneal measurements for astigmatism (corneal topography) were taken prior and after cataract surgery (1 day, 1 month and 3 months). The induced astigmatism was registered in all cases and then compared between the 3 groups.
Results
The group that has less induced astigmatism was the one operated with 0.7 mm BIMICS + 2.2 mm frown incision for IOL implantation (less than 0.23 D); the group operated with 0.7 mm BIMICS + 2.2 Clear Corneal Incision for IOL implantation developed 0.73 D; and the group operated with 2.2 COMICS developed 1.13 D.
Conclusion
Microbiaxial cataract surgery, followed by a 2.2 Ffown incision for IOL implantation is the technique with less induced astigmatism, and so safe to perform refractive cataract surgery.