The concept of Barrett Universal II formulae for IOL power calculation

This video explains the Barrett Universal II formula and the science behind it. This video is with voiceover, while my earlier video on the same subject was without voice. The Barrett Universal II formula helps determine IOL power for cataract surgery. The video explains the conceps of physics associated with it and Lens Factor, how it determines the posterior corneal curvature to determine net or total corneal power, etc