LAUSR

The purpose of this review is to evaluate the usefulness of corneal topography to select premium intraocular lenses (IOLs) including aspherical IOLs, toric IOLs, and multifocal IOLs in refractive cataract surgery. Corneal topography can detect corneal regular astigmatism, corneal irregular astigmatism (higher-order aberrations: HOAs) including spherical aberration, and corneal shape abnormalities following corneal refractive surgery. Surgeons can explain to the patients with significant corneal HOAs about its effect on the post-operative visual function before surgery. Multifocal IOL should not be selected for such eyes. For eyes with abnormal corneal shape, appropriate IOL power calculation formulae can be applied. In the case of toric IOL, not only regular astigmatism but also corneal HOAs should be checked. Before implanting an aspheric IOL, it is ideal to confirm spherical aberration of the cornea is not below the normal range. As corneal HOAs, abnormal corneal shape following corneal refractive surgery, corneal regular astigmatism, and corneal spherical aberration increase post-operative refractive errors and poor quality of vision with premium IOLs, corneal topography prior to cataract surgery is helpful in screening patients who are not appropriate candidates for premium IOLs.