A CORRECTION OF ASTIGMATISM скачать в хорошем качестве

A CORRECTION OF ASTIGMATISM

Limbal Relaxing Incision (LRI) - It is a refractive surgical procedure to correct minor astigmatism in the eye. LRI involves making a pair of incisions at the corneal limbus just anterior to the vascular arcade. By adjusting the length, depth, and location of the arcuate incision, one can induce changes in the corneal astigmatism. Specifically, changes in corneal astigmatism are achieved by flattening the steep corneal meridian with a simultaneous increase in corneal curvature in the flat meridian. (NAPA normogram used) LRIs are often combined with a cataract operation to reduce preexisting astigmatism and thus, resulting in better postoperative uncorrected vision. OCCI (Opposite clear corneal incision)-- Paired OCCI on the steep axis is a useful technique to correct mild to moderate pre-existing astigmatism. 3.5 mm opposite clear corneal incisions straddling the steep axis decreased pre-existing astigmatism by about 2 D.