Technology to Avoid Pitfalls with Astigmatism and Toric IOLs
Ocular astigmatism is a refractive condition that occurs due to unequal curvatures of the cornea and the crystalline lens, decentration and/or tilting of the lens, unequal refractive indices across the crystalline lens, and in some cases, altered geometry of the posterior pole. 1 In the modern world, with advancing technology and digitalisation, a patient’s aim is not just clearer vision with correction, but a more focussed vision with little or no correction. Astigmatism, even as low as 0.5D, can cause fuzzy vision that can impact uncorrected visual acuity (UCVA) outcomes. Astigmatism may be corrected postoperatively with the use of glasses and/or contact lenses. However, most patients undergoing cataract surgery aim for good uncorrected vision, at the least for distance, if not all distances.