we all know that the laser is very important in the correction of the eyes,so we will show the benefits of this correction on the eyes firstly, the laser of the eyes berform to accuracy and speed healing of the cornea and the return of the patient to exercise its activity within 24 hours and the scarcity of any setback in the eyes. secondly, we will show the harms that laser do ine eyes,these Processes differ from person to another,so it may lead to increased eye pressure fluids And the patients need to corneal transplantation to treat the problem,and there are another cases that lead to the drought of the eyes,but this hardly happen. so we should avoid these harms by follow the advises of the doctor befor the surgery and after it.