T he discovery of the ophthalmoscope in 1851 is rightly attributed to Hermann von Helmholtz. However, 4 years earlier, in 1847, Charles Babbage nearly invented the instrument that was to revolutionize ophthalmological examination so dramatically.
Keeler CR. 150 Years Since Babbage's Ophthalmoscope. Arch Ophthalmol. 1997;115(11):1456-1457. doi:10.1001/archopht.1997.01100160626017