The side effects associated with the use of Iopamidol for myelography were determined in 100 patients and compared with metrizamide in a double-blind study.

Correction of astigmatism resulted in undercorrection of approximately 30%. Our experience with the keracor shows PRK up to 6 D with or without additional correction of astigmatism (PARK) to be comparatively safe in terms of regression and complications and equally accurate in reaching spherical target refraction.