Leonardo Da Vinci had a vision. His insight was for improved vision for people with less than perfect sight. He delved into the science of light and sight and devised a solution to eye defects. What was that science? How did Da Vinci come up with those conclusions? How did he envision the contact lens? We'll answer those questions here with a look at how contact lenses work.
Perfect vision occurs when light rays converge at a point directly on the retina . If light rays fail to hit that point at exactly the same point, then vision becomes blurry. So the purpose of corrective lenses is to refocus light rays so they do converge at that point on the retina.