6 dioptersA cow as seen by someone with 6 diopters of nearsightedness5 dioptersA cow as seen by someone with 5 diopters of nearsightedness 4 dioptersA cow as seen by someone with 4 diopters of nearsightedness 3 dioptersA cow as seen by someone with 3 diopters of nearsightedness2 dioptersA cow as seen by someone with 2 diopters of nearsightedness1 diopterA cow as seen by someone with 1 diopters of nearsightednessFull eyesightAnd that’s what the cow looks like with the right glasses.“With these glasses I can see! Not with my old one. I didn’t even know that there were different glasses! “Viviana Chacolla (54), primary school teacher – Santa Cruz, Bolivia