Munthu aliyense yemwe ali ndi chiweto chamagulu anayi, tsiku ndi tsiku amayang'anitsitsa mu maso ake a galu wochenjera, odzipereka. Amamvetsetsa pafupifupi chirichonse, amasonyeza chisangalalo kapena chisoni, koma sangathe kuuza chilichonse mbuye wawo. Kodi ndondomeko ziti zomwe zimachitika pamutu pawo? Kodi agalu amaona kuti dziko lathuli likuzungulira bwanji? Mukawerenga nkhaniyi, zikutanthawuza kuti mudakondweretsanso mafunsowa kangapo. Kwa nthawi yayitali asayansi akhala akuphunzira agalu, ndipo ena mwa deta omwe amapezeka chifukwa cha zomwe akhala akumana nazo nthawi yaitali, chifukwa anthu ambiri sangayembekezere.
Kodi galu amawona mitundu ingati?
Posachedwapa, tinatsimikiziridwa kuti agalu amaona dziko lapansi ngati lakuda ndi loyera. Maganizo awa anali olakwika. Masomphenya a mtundu wa ziweto zathu ndi osiyana ndi anthu, komabe sangatchedwe kuti ndi osawona. Zingokhala kuti zinyamazi zimakhala ndi mawonekedwe osiyana. Mu retina pali makondomu apadera omwe amachititsa chidwi cha mtundu. Cholengedwa chirichonse chamoyo iwo ali apadera. Amene amawona zofiira, abwenzi athu amphamvu anayi satero. Mthunzi wobiriwira wobiriwira womwe uli ndi chikasu chofiira, akhoza kusokonezeka. Ndipo nsalu ya buluu yaiwisi kwa agalu ambiri angawoneke ngati pepala loyera.
Kodi agalu akuwona mumdima?
Asayansi a ziweto zathu zam'mazinyo anayi amatchedwa nyama zakutchire, zomwe zimakonda kwambiri masana ndi usiku wamdima. Mitengo yowala imakhala yabwino kwambiri kuposa iwowo. Izi zimalola agalu kusiyanitsa mitundu yambiri ya imvi. Dzuŵa likadutsa, ambiri a ife sitiwona kalikonse popanda kuwala, koma agalu akupitiriza kukhala omasuka. Zimatsimikiziridwa kuti usiku usiku maso awo ali 3 kapena 4 kangapo kuposa anthu. Retina ya maso a ophunzira athu adagawidwa m'magulu. Gawo lakumunsi limatenga kuwala kwambiri, zomwe zimapangitsa kuti mwiniwake awone bwino. Ndipo gawo lapamwamba limakonzedwa kuti likhazikitse masomphenya usiku.
Agalu ndi zinyama, ndipo kwa iwo ndikofunikira kudziwa chinthu chosaka nthawi iliyonse ya tsiku. Amakhala bwino kulumikiza zolinga zosuntha kuposa chinthu chokhazikika. Nyama izi zimatha kuona kayendedwe kanu pamtunda wa mamita 800-900. Koma ngati chinsinsicho chibisika, ndiye mlonda wazonda anayi adzawona mamita okha kuchokera pa 600. Ndi chifukwa chake munthu wopulumukayo adzazindikira msanga ngati agalu ngati chinthu chosaka.
Kodi agalu amamuwona bwanji pafupi? Izo zatsimikiziridwa ndi zochitika zomwe pafupi ndi chinthu kuti agalu aziwoneka mopanda kanthu. Koma anthu angaganizire mosavuta pa nkhani zakufupi. Abale athu ang'onoang'ono sali ochepa, monga momwe ena amaganizira. Iwo amakhalanso ndi malo ocheperapo (pafupifupi 0,5 diopters). Kusiyanitsa kwina pakati pa agalu ndi anthu ndikuti diso la munthu liri pa mzere umodzimodzi, ndipo apa pali-mizere iyi imasiyanitsa pang'ono kumbali, pafupi madigiri 20. Ziwerengero zomwe zimatchulidwa zimadalira kwambiri mtundu wa nyama, momwe chigaza cha nyama zosiyanasiyana chimakhalira. Yerekezerani, mwachitsanzo, mutu wa pug , Pekingese ndi m'busa wa Germany . Koma mulimonsemo, munda wa masomphenya a zinyama izi zidzakhala zoposa zomwe ife tiri nazo. Agalu athu ali ndi chifaniziro chokwanira osati kokha pa zomwe amawona ndi maso awo, koma m'njira zambiri zimatengera malingaliro ndi fungo.
Funso ndilo, kodi agalu amaona mtundu, tawunika kale. Ndipo akuwona chithunzi pa TV? Mawotchi athu ailesi yakanema amakonzedwera anthu. Mapangidwe awo amawoneka kuti nyamazi sizingathe kuona fano lachilendo pazenera (kuti agalu asakhale ochepera 80 HZ). Mmalo mwa kanema, Bobics ndi Balls zimayang'ana melteshenie imodzi. Koma ma TV atsopano omwe ali ndi chiwerengero cha 100 Hz kwa abale athu ang'onoang'ono akhoza kukhala ofunika. Kumadzulo, ngakhale anayamba kuwombera nthiti yapadera kwa ziweto zovuta