Ruchika Kedia
Wavikar Eye Institute, India
Title: Current understanding of posterior corneal astigmatism
Biography
Biography: Ruchika Kedia
Abstract
Evaluating patient’s astigmatic error isn’t just about the shape of the front of the eye anymore. Failure to include posterior corneal curvature in the presurgical cataract calculations can bring unwanted refractive surprises for both patient and surgeon. There’s a fair amount of astigmatism on the posterior surface of the cornea.Using an intraocular lens in which the lens calculation for toricity is based on the anterior cornea alone will lead to an overcorrection in eyes that have with-the-rule astigmatism and under correction in eyes with against-the-rule astigmatism. Posterior corneal astigmatism must be measured and the net astigmatism should be used in the toric lens calculation