While many patients with LASIK complications have problems driving safely at night, a large number of patients also have problems driving during the day. In general, daytime driving is easier because sunlight shrinks the pupil, resulting in better overall vision. However, some patients report blurry vision, ghosting, and loss of contrast sensitivity even in the best lighting conditions. Some patients can't even pass the driving test, which generally requires 20/40 vision. Many of these patients worry that in the long term, states may adopt vision quality testing, and that they could lose their license even with 20/40 acuity. Examine the images below, for example. How fast could these drivers respond to an emergency situation when everything in their visual field is somewhat blurred and doubled?

Images courtesy VisionSimulations.com