Keratometry is quicker, cheaper and easier to use for measuring corneal curvature on routine patients, but corneal topography has far more advantages: a good topographer can measure up to 20,000-40,000 data points across the entire cornea while keratometry only measures four points within the central 3mm of the cornea. A keratometer will miss any distortion of the cornea that occurs within or outside those four data points. A corneal topographer will allow you to map the curvature across the majority of the anterior corneal surface, as well as document any changes in the cornea over time. As the popularity of wavefront sensing continues to rise, it is still important to keep pace with corneal topography, which remains an indispensable part of anterior segment ophthalmology practice. Refractive surgery industries have made huge investments in combining corneal topographic and wavefront-sensing technologies. Recent hardware developments have ushered in a new era of cornea and refractive surgery with topography-guided and wavefront and topography-guided custom treatments that achieve unprecedented superior clinical results. The major refractive component of the cornea being its front surface, it is not dif-ficult to understand that most refractive techniques developed through history have involved this frontal surface.