To be fit for laser surgery you have to meet some basic eligibility criteria Minimum 18 years old specs numbers must be stable for the last 6 months. Minor variations of 0. 25 D and 0.50 D are satisfactory. Ladies should not be pregnant or on breastfeed or 6 months post-pregnancy. You must not be consuming any medicines such as steroids. After you meet these basic criteria, then you will have to undergo a Pre Lasik workup test which involves 6 to 7 different kinds of tests to eventually declare you the right candidate for laser surgery.