Tag: vision
-
The history of eyeglasses
Efforts to improve vision date back to the ancient civilizations of India and China. Greek scholars such as Ptolemy and Euclid endeavored to understand the physics of light refraction, the mechanisms of lenses, and how their properties can enhance vision and literacy. The Romans magnified the letters they were looking at by placing reading stones…
-
“Avoid a remedy that is worse than the disease”
Howard FischerUppsala, Sweden Overconfidence is an undesirable quality. It does not enhance a physician’s approach to learning, nor to changing when change is needed. How a doctor diagnoses or treats a condition today may cause future generations of physicians to wonder, “What were they thinking? Did they not think about potential long-term effects?” Such future…
-
“Troubled in my eyes”: the risks of reading and writing
Katherine HarveyLondon, England, United Kingdom On January 1, 1660, a young Londoner named Samuel Pepys began to keep a diary. Over the next nine and a half years, he recorded both events of national significance—the Restoration of King Charles II, the Great Plague, and the Great Fire—as well as the minutiae of his private life,…
-
Ignes Fatui of the neurotic mind
Ashten R. DuncanTulsa, Oklahoma, United States Rocking in my vessel sturdyUpon the waters of a swamp so dirty,I am in the crow’s nestEn route to my impending test. Ever since I was young,I have been given to the far-flung:Quiet panic of a possible foe,Wishes to never disturb another’s flow. In the confines of the nest,I…
-
Nature telling her secrets: the Kepler–Descartes connection
Ronald FishmanChicago, Illinois, United States Nature tells us one secret in terms of another, and she may refuse to disclose one secret until another has been laid bare.– T.S. Kuhn1 In 1604, Johannes Kepler solved the problem of how light is refracted within the eye to produce an image on the surface of the retina. This problem…
-
Monet and his cataracts
Peter KopplinToronto, Ontario, Canada In January 1923, the elderly artist Claude Monet struggled restlessly in his room after his cataract surgery. He got up and tore at his bandages.1 His family put it down to his temperament. But an elderly man in his eighties, immobilized, recovering from surgery with limited sight in the left eye…