The vision test for obtaining a driver' s license should not be limited to measuring the adequacy of vision in daylight conditions, as is the current practice. Many people whose daylight vision is adequate have night vision that is inadequate for safe night driving. Most car accidents occur at night, and inadequate vision plays a role in 80 percent of these accidents. The main point of the argument is that ['inadequate vision is the primary factor in the majority of car accidents that occur at night', "the vision test for obtaining a driver's license should measure the adequacy of vision in night conditions", 'inadequate vision does not play a role in most of the accidents that occur in daylight', "the current vision test for obtaining a driver's license ensures that most licensed drivers have adequate vision for night driving"]