You are required to go through a LASIK Pre-op assessment to determine if you are a suitable candidate, but here are some general guidelines: Age: At least 18 years old. Parental consent will be required if you are below 21 years old. Stable vision and spectacles prescription for at least a year before surgery. Patients do not have glaucoma, cataracts, retinal problems, infections or any other eye conditions. Currently not pregnant or breastfeeding.