Karteikarten
History of Spectacles
Karten in diesem Stapel (5)
- 1Though there is earlier evidence of spectacles, the invention is credited to this inventor in 13th century FlorenceSalvino d'Armati
- 2It was not until the 16th century that lenses of this type were developedminus (or concave) lenses
for treating Myopia (nearsightedness) - 3this type of spectacle lenses were not developed until the 19th centurytoric lenses for treating astigmatism
- 4bifocals were invented in the 18th century by this famous American polymathBenjamin Franklin
- 5—