Willebrord Snell was in fact the first person to document the relationship between the paths taken by light rays when crossing boundaries between two surfaces and their refractive index.

Presbyopia is a vision disorder that impacts 3 million new people every year in the U.S., but that are the symptoms, what causes presbyopia and how is it treated?

Kepler wrote a book titled Astronomia Pars Optica, earning him the title of founder of modern optics. It was in this book that he documented his observations, experiments and formulas accurately depicting the process of refraction within the eye.

The first use of spectacles and eyeglasses was observed in the late thirteenth century by Friar Giordano da Pisa on the occasion of a meeting with a craftsman living near Pisa, Italy.

Roger Bacon’s studies and observations led him to make the earliest recorded comments regarding the use of lenses for optical purposes.

Learn commonplace techniques that can be used to insert contact lenses. Depending on your preference and ability there find out which technique you should use to insert your contacts.