Umbala ongaboniyo, okanye ukusila kombala, kubhekisela ekungenakwenzeka komntu ukuchonga ngokucacileyo imibala ethile. Iingxaki zombono zombala zivela ekungakwazi ukubona imibala eyahlukeneyo yombala ukuba ungakwazi ukubona imibala ethile. Abantu abaninzi bakholelwa ngokugqithiseleyo ukuba ukuba yimpumputhe imbala kukujonga ihlabathi ngokumnyama nomhlophe kuphela , kodwa ubumfama obugqibeleleyo abuqabile.
Umbala oyimpumputhe umntu unenkxalabo yokuhlukanisa phakathi kwemibala ebomvu nokuluhlaza, ukuwaphuca umbala ofanayo. Uhlobo oluqhelekileyo lwembala yobumpumputhe lubandakanya imibala eluhlaza nolululanga.
Izizathu
Umbala ongaboniyo ubangelwa iiseli kwi-retina eyenza imibala ngokungahambelani. Amaseli athile afanelekileyo, aphethwe ngumboniso wembala, akakwazi ukuthumela izibonakaliso ezifanelekileyo kwingqondo. Umbala oyimpumputhe udla ngokufa. Phantse iipesenti ezisibhozo zamadoda kunye neepesenti enye yabasetyhini abanembonakalo yombala. Amadoda amaninzi achaphazelekayo yintlupheko kunabesifazane.
Ngamanye amaxesha, izifo zamehlo ezithile zenza ubumpumputhe bombala, obizwa ngokuba "bubunobumba obubonakalayo." Ukuguga nako kunokubangela ingxaki; njengoko ilensi ibumnyama ngokudala, abantu abadala bayakufumana kunzima ukuhlukanisa imibala.
Iimpawu
Uphawu oluphambili lobumfama obunobumba bunzima ukuhlukanisa phakathi obomvu kunye nohlaza okwesibhakabhaka okanye okwesibhakabhaka nokuluhlaza.
Abazali baya kukhankanya ububungqina bombala xa umntwana wabo enzima ukufunda imibala. Abantwana abanenkinga esikolweni kufuneka bavavanyelwe ukungaboni kakuhle kombala, izinto ezininzi zokufunda zixhomekeka kakhulu kubafundi abakwazi ukwahlula phakathi kwemibala.
Ukuxilongwa
Uvavanyo oluqhelekileyo lokufumanisa umbala ongaboniyo luvavanyo lukaIshihara.
Uvavanyo olukhawulezayo nolulula luqulethwe imifanekiso yeefoto ezinemibala. Phakathi kwamachaphaza ngumfanekiso, ngokuqhelekileyo inombolo, eyenziwe ngamachaphaza ombala ohlukileyo. Umntu onombono oqhelekileyo wombala uya kuba nako ukubona inombolo, kodwa umntu oyimfama oyiboni uya kubona inombolo eyahlukileyo okanye akukho namba nhlobo.
Olunye uvavanyo olwenziwe ukuxilonga ubumpumputhe bombala lubizwa ngokuba luvavanyo lokulungiselela, apho isigulane siceliwe ukuba silungise iqela leepidi ezinemibala ethile.
Unyango
Ngelishwa, akukho nonyango yokuphunga umbala. Abantu abanobuthathaka bembala, ke, bafunde iindlela zokujamelana neengxaki. Izigulane zihlala zifundisa ngokwazo indlela yokwahlula phakathi kwemibala eyahlukeneyo kunye nemibala emibala.
Abanye oogqirha banikezela iilensi zokulungisa imibala , kuxhomekeke kubukhali bokubonakala kombala. Ukongezelela, isofthiwe yekhompyutheni iye yaphuhliswa ukunceda abo banemiqobo yokujonga umbala.
Umthombo:
Umbutho we-American Optometric, Ubunzima beMbala. 17 Julayi 2007.