[The evolution of corneal astigmatism after cataract surgery]

The study is a prospective one based on the observations of 186 eyes. The preexisting astigmatism was measured and the patients were divided in two main groups based on this astigmatism: by-the-rule and against-the-rule astigmatism. I evaluated the effects on the corneal astigmatism of different types of cataracts surgical procedures. The measurements sustain the results published in the specialty literature. By-the-rule astigmatism increases post-operatively and decreases in time, passing in an against-the-rule astigmatism. Against-the-rule astigmatism passes into an by-the-rule one and in the final he regains his previous type.