John McAllister, Sr. and the First U.S. Shop for Optometric Services
John McAllister Sr

After opening the John McAllister firm there was no looking back. The firm became nationally recognized as specializing in everything optical. This included optical equipment, vision correction tools, mathematical instruments, and commercial photographs.

What is Anisometropia and How is it Treated?

Anisometropia is a condition first discovered by a Spanish scholar named Benito Daza de Valdes. According to Contact Lens King he described the disorder as a disorder where the two eyes have different refractive powers.

King Charles I's Royal Charter of the Worshipful Company of Spectacle Makers
King Charles the First

How did King Charles the First's charter play a role in Optometry? Let's look deeper at King Charles I's royal charter of the Worshipful Company of Spectacle Makers and how it impacted the field of optometry.

Daza de Valdes and The First Book of Optometry
Daza de Valdes

Born in 1591 in the city of Cordoba, Spain, Valdes grew up craving knowledge. He graduated from the University of Seville in 1616 with a Bachelors of Arts and Philosophy and became a scholar of natural philosophy and medicine.

Willebrord Snell and His Law of Refraction
willebrord snell

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.


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