 I'm going to demonstrate an LRI now. It is very important to dry the surface of the eye before you mark. Otherwise, the ink markings can run. So I use a wax cell sponge and I use a Mendez ruler. There are many different ways of marking. One is better necessarily than the other. And in this case, I used an inked Calibri to mark my three dots. My arc that I'm going to connect with a diamond blade that's preset. I go in perpendicular to the cornea and in one gentle move, drag the LRI blade and connect the three dots and then remove. And the LRI is done.