In this lecture, we will examine the main causes of blindness. We will show how a fundamental understanding of the laws of Physics (before and after Newton) and tools developed based on these fundamental laws have played a central role in the accurate diagnostic and eventual elimination of many forms of blindness. We will then focus on the remaining challenges and how they are being addressed. Some of the topics we will discuss include near sightedness and why glasses actually work, LASIK, cataract, macular degeneration, and retinal detachment, as well as artificial vision. Come see for yourself !