Custom LASIK involves measuring the eye from front to back with a special laser, using what's called "wavefront" technology, to create a three-dimensional (3-D) image of the eye. The information contained in the wavefront-map guides the laser in customizing the treatment to your individual visual system.
IDESIGN is the latest way to do Wavefront-guided Custom LASIK. It uses an advanced Wavefront measuring device to precisely measure your cornea. ... It measures 240 points on the cornea for your treatment. This means a more precise measurement than conventional LASIK, but not as precise as iDesign.
Custom wavefront LASIK — also called custom LASIK or wavefront LASIK — adds a greater degree of precision and personalization to LASIK vision correction surgery by using advanced wavefront technology to evaluate the unique characteristics of your eyes.Conventional LASIK surgery attempts to recreate the vision correction that your eyeglass prescription provides.
But eyeglass prescriptions are not unique — thousands, even millions, of people can have the same eyeglass prescription. And because of unique characteristics of each person's eyes that cannot be measured with the conventional technology used to determine refractive error during an eye exam, people who have the same eyeglasses prescription will see the world with different degrees of clarity with those same prescription lenses.