Zintoni izinto ezibangela elifutshane-bisayo?

Ukubona - luhlobo ukuphazamiseka umsebenzi ezibonwayo, apho iliso angabona ngokucacileyo izinto kufutshane, kwaye izinto ebekwe kude babe lichaza imfiliba ngaye. Igama yesibini yale meko - ukubona. Le ongaboniyo kuvamile kakhulu. Ngokutsho manani, kuba waphawula wonke ummi yesithathu Umhlaba. Yintoni ebangela ukubona? Yintoni na indlela ivela khona? Izizathu kulala elifutshane bisayo of refraction engagunyaziswanga lweliso. Umfanekiso senziwa loo unxaxho ayikho kwi retina, kodwa phambi kwayo. Ngoko ke, retina iyabetheleleka smudged yaye omnye eluziziz ubona izinto.

oonobangela

Okwangoku, oosonzululwazi unokuvelisa osisityebi ukuqokelelwa kokuma into enzima efana ukubona. Ngelo xesha nye ikwazile ukuba bazakhele ezibangela ukubona:

1. umthwalo ezibonwayo egqithisileyo, okukhokelela nzima emehlweni akho. Oku ifundwe iimeko zokukhanya, umsebenzi elide kwi computer okanye ukubukela umabonakude elide.
2. nezici zamafa. Ngokutsho manani,-50% abantwana abanabazali ubunzima ukusuka ukubona, kunye neminyaka eli-18 Kukwabonakala umbono imfiliba. Ukuba ukubona waba umzali omnye kuphela, ipesenti kusithwa 20-25%. Ukuba abazali babe umbono eziqhelekileyo, abantwana ubunzima ukusuka ukubona%-8 kuphela amatyala. Ezi ngqwalasela kwakhokelela kwisigqibo sokuba ufuzo ukuze adlale indima oonobangela elifutshane-bisayo.
3. ukuphazamiseka Hemodynamic - ezingonelanga kwegazi kuloo maziko umbono, igazi kolihlwempu inwebu yangaphakathi yamehlo, nokuhluthwa ukuhamba kwegazi Orbital kunye central.
4. nezingafezekanga. Kuba eliqhelekileyo ijwabu synthesizing kufuneka inani rhoqo lweziqalelo zokulanda umkhondo ezinoncedo ezifana zinc, ubhedu, Konqueror. ukuswela zabo kuthathwa unobangela ukubona.

zenzululwazi ukubona

Ukuze umbono kunokwenzeka, iliso yabantu ithumba reyi ukukhanya kubonakala ukusuka izinto ezahlukeneyo elijikelezileyo. Ngaphakathi ngeso refracted ngendlela efana ukuba bajolise kwi retina umfanekiselo kwindawo efanelekileyo. reyi Ukukhanya evela izinto ezikude na ulwalathiso phantse ngaxeshanye. Xa ukubona iliso ineenkalo watshintsha kunye neenkqubo reyi ezifana ne Bill. Umfanekiso senziwa phambi kwiretina. Rays evela izinto elikufutshane ke umahluko ngakwicala intshukumo. Bona ngayo iliso eqhelekileyo.

"Ngenxa intuthuzelo, ophilileyo ..."

Ezinye izazinzulu zikholelwa ukuba elifutshane bisayo - eyongeziweyo lobeko zebhayoloji eminye abaqhelekileyo kwi iimeko ngakumbi uxinezeleko phezu amaziko umbono. Amehlo bavumelane umsebenzi ezikufutshane kule ombane ubuncinane. Yaye oku sisizathu sokuba nethemba, akunjalo? Ezi izimvo malunga umongo kunye neembono ezisisiseko kwi oonobangela ukubona.