The cornea would be the very clear, round "window" of tissue that allows gentle to enter the front of the eye. By reshaping the cornea, the surgeon adjusts the focus of light over the retina. (The retina would be the layer at the back of the eye responsible for sight.) https://tintindirectory.com/listings834526/the-smart-trick-of-lasik-eye-surgery-that-nobody-is-discussing