LASIK is performed as a refractive surgery to correct nearsightedness, farsightedness and/ or astigmatism. After LASIK is performed, people who previously needed to wear glasses or contact lenses frequently will be able to see in certain conditions without glasses or contact lenses. Nearsightedness allows for clear vision at near, but viewing objects at a distance is unclear. People who are farsighted can see well at a distance but have difficulty seeing objects from closeby. Astigmatism causes blurry vision due to the shape or size of the cornea. A cornea that has uneven curvature results in astigmatism. The best results of LASIK tend to be for those who have mild nearsightedness.