Madubin rai da nunin kyawun ciki, idanu, tare da kwakwalwa, suna yin aiki mai mahimmanci don mu rayu sosai, mu koyi wannan duniyar tare da dukan bambancinta da launuka. Sau nawa yana da wuya a gare mu mu ci gaba da saduwa da ido, a yau za mu yi magana game da su: m da ban mamaki.
1. A haƙiƙa, ƙwayar ido tana fahimtar duk gaskiyar da ke kewaye daga sama zuwa ƙasa. Bayan haka, kwakwalwa tana jujjuya hoton don fahimtar mu.
2. Hoton da ke kewayen duniya ana gane shi ta hanyar retina a rabi. Kowane rabin kwakwalwarmu yana karɓar hotuna 12 na duniyar waje, bayan haka kwakwalwa ta haɗa su tare, yana ba mu damar ganin abin da muke gani.
3. Mai ido ba ya gane ja. Mai karɓar "ja" yana gane launin rawaya-kore, kuma "kore" mai karɓa yana gane launin shuɗi-kore. Kwakwalwa ta haɗa waɗannan sigina, ta juya su ja.
4. Mu na gefe hangen nesa ne sosai low ƙuduri kuma kusan baki da fari.
5. Masu idanu masu launin ruwan kasa tsofaffin makaranta ne. Dukan mutane a asali suna da idanu masu launin ruwan kasa, idanu masu launin shuɗi sun bayyana azaman maye gurbin shekaru kimanin shekaru 6000 da suka gabata.
6. Matsakaicin mutum yana yin kiftawa sau 17 a cikin minti daya.
7. Mutumin da yake kusa da shi yana da kwallin ido fiye da yadda ya saba. Mai hangen nesa yana da ƙaramin ƙwallon ido.
8. Girman idonka ya kasance kusan iri ɗaya tun daga haihuwa.
9. Hawaye yana da nau'i daban-daban dangane da ko ya fito ne daga haushin ido, hamma ko girgiza motsin rai.
10. Idon dan Adam na iya gane kala kala miliyan 10.
11. A cikin sharuddan kamara na dijital, idon ɗan adam yana da ƙuduri daidai da 576 megapixels.
12. Ciwon idon mutum kamar na shark ne. Wanene ya sani, lokaci na iya zuwa lokacin da za a yi amfani da cornea na shark a aikin dasawa!
13. Sunan sunadarin furotin mai saurin walƙiya bayan kyakkyawan Pokemon Pikachu. Masana kimiyyar kasar Japan ne suka gano shi a shekara ta 2008, sunadaran suna taka muhimmiyar rawa wajen isar da siginar gani daga idanu zuwa kwakwalwa, da kuma ido bayan wani abu mai motsi.