Laser vision procedures such as SMILE or LASIK work very well at correcting nearsightedness and astigmatism.  As our eyes age and we encounter presbyopia (the loss of focusing ability for near tasks), reading glasses are then required. Some patients that are presbyopic will elect to have one eye targeted for the best distance and the other eye will be a little nearsighted to help with near vision and reduce the need for reading glasses.  This is referred to as monovision.   Multifocal IOLs can work well for presbyopic patients that either do not tolerate monovision or prefer equal or binocular vision.  Our natural lens is the root cause of presbyopia and these IOLs can correct the vision at distance, intermediate and near.