Podcast
Questions and Answers
Who suggested 2 methods of correcting irregular K in 1845?
Who suggested 2 methods of correcting irregular K in 1845?
- Eugene Kalt
- Adolf Fick
- Johann Schaeffer
- Sir John Herschel (correct)
Who was the first to describe the process of fabricating & fitting contact lenses?
Who was the first to describe the process of fabricating & fitting contact lenses?
- Johann Schaeffer
- Adolf Fick (correct)
- Eugene Kalt
- Sir John Herschel
What was the primary issue with glass scleral lenses according to the text?
What was the primary issue with glass scleral lenses according to the text?
- Comfort
- Cost
- Durability
- Transparency (correct)
In what year did Adolf Fick fit himself with an afocal scleral contact lens?
In what year did Adolf Fick fit himself with an afocal scleral contact lens?
Who successfully fitted 2 keratoconic patients with afocal scleral contact lenses?
Who successfully fitted 2 keratoconic patients with afocal scleral contact lenses?
Who suggested two methods of correcting irregular K in 1845?
Who suggested two methods of correcting irregular K in 1845?
What was the primary issue with glass scleral lenses according to the text?
What was the primary issue with glass scleral lenses according to the text?
Who was the first to describe the process of fabricating and fitting contact lenses?
Who was the first to describe the process of fabricating and fitting contact lenses?
In what year did Adolf Fick fit himself with an afocal scleral contact lens?
In what year did Adolf Fick fit himself with an afocal scleral contact lens?
Who successfully fitted two keratoconic patients with afocal scleral contact lenses?
Who successfully fitted two keratoconic patients with afocal scleral contact lenses?
Who suggested two methods of correcting irregular K in 1845?
Who suggested two methods of correcting irregular K in 1845?
In what year did Adolf Fick fit himself with an afocal scleral contact lens?
In what year did Adolf Fick fit himself with an afocal scleral contact lens?
Who successfully fitted two keratoconic patients with afocal scleral contact lenses?
Who successfully fitted two keratoconic patients with afocal scleral contact lenses?
What was the primary issue with glass scleral lenses according to the text?
What was the primary issue with glass scleral lenses according to the text?
Who was the first to describe the process of fabricating and fitting contact lenses?
Who was the first to describe the process of fabricating and fitting contact lenses?
Study Notes
Early Theories of Contact Lenses
- The concept of contact lenses was thought of as early as 1508, although they were not fitted until the late 19th century.
- Leonardo Da Vinci wrote about the optical principle underlying contact lenses in 1508 and sketched a device that used an eye in a bowl of water to alter K power.
- Renee Descartes described a glass fluid-filled tube to be placed in direct contact with the cornea in 1636, but this design made blinking impossible.
- Thomas Young constructed a device in 1801, essentially a fluid-filled eyecup that fitted snugly into the orbital rim, allowing blinking to be possible.
- These early theories laid the foundation for the development of contact lenses in the late 19th century.
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Description
This lecture prepares you to understand the history of contact lenses, from early theories to the late 19th century when they were first fitted. It includes insights from scholars such as Leonardo Da Vinci and explores the optical principles underlying contact lenses.
