Show color blindness traced to variety of causes color blandi ess also called i sy and Is the anabil ity tu to distinguished certain c lors t r shades of ci ci 1 r I 1 idal tal c lor for blit baird d ness in I 1 ich felt tl if ere pre Is no perception in li n of jl A rs as such but only of giada tl if ns of 1111 t nn tin I 1 sl nde ade Is rare the binin D arm f ani states a writer in ahe ii it liadal Us lis news neis Is that in wilch wl ich q i e brict clors different ID in different tases cases are e with edth each other th tit agh other c I 1 rs are c correctly I 1 er ercel elved ved 1 I 1 r biln iness may he be 1 I e trebert fr i 11 j birth i r ailred it Is said frea aly to be froni front arar grard dr ill er to grin is n and Is n ore c tit n in dales it ales thin in fe in fps in the pr i 1 artl n futol f 3 to 1 alred c I 1 r blin lr it ess in anny ay iy be ca se I 1 I 1 ly y a dise ise I 1 bi tin or by a disease I 1 or wournel out ae I 1 r tic nerve but it ap pa ears cars to be buncom belted with defects of sight and with retinal diseases generally it Is sometimes temporary but even in such cases is usually recurrent in Ine increasing acute forms the average age eye distinguishes six spectral colors an acute sense of color distinguishes seven color blindness affecting one eye or both has no known remedy it must however boa hoi ever be distinguished from mere ignorance of olor names A case of color blindness was mentioned in 1081 1084 and others bere ere noted in 1777 and 1779 but the most famous fatuous early instance from which the defect was known as was that of the I 1 chemist lohn dalton who in 17 described his own on case investigations during 0 the nineteenth century es ablis abolished hed the luil ortance of color blindness esre esle lally in the mercantile marine and rallay service and tests were ere deded lei ased for al a cants for such positions L i jul |