LASIK (laser-assisted in situ keratomileusis) is a surgical procedure that changes the shape of the cornea (the clear covering of the eye). The cornea can then focus light better on to the retina (the layer at the back of the eye that contains nerve cells that sense light), resulting in clearer vision and reduced need for glasses or contact lenses.

The procedure involves cutting a flap in the cornea, removing tiny bits of corneal tissue with a laser and then replacing the flap.

Read about laser vision correction at Re: Vision here.