Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Kupfuura: Tsinga yokuona inoumbwa nema axon esero re ganglion retinal nemasero e glial. Tsinga imwe neimwe yokuona yomunhu ine tambo dzetsinga dziri pakati pe770 000 ne1,7 miriyoni, idzo dziri axon dzemasero e ganglion retinal erimwe retina. Mufovea, iyo ine kupinza kukuru, aya masero e ganglion anobatana nemasero e photoreceptor asingasviki 5; mune dzimwe nzvimbo dzeretina, anobatana nezviuru zvakawanda zve photoreceptors.  Mubvunzo: Tsinga dzomunhu dzokuona dzine tambo ngani dzetsinga
770 000 uye mamiriyoni 1,7