Paper, 'Casus rarissimus visus objectorum partialis' [On cataracts] by Abraham Vater Vater shares the case study of a middle-aged woman who develops impaired vision, and sees objects as if through a mist or a net. Subject: Physiology / Optics Published in Philosophical Transactions as 'Casus rarissimus. visus objectorum partialis, communicante Domino Abrahamo Vater, Prof. Med. Wittemb. R. S. S.' Read to the Royal Society in May 1724 1724