Kuwoneka bwino ndizoyeso momwe mungathe kuwonera bwino. Chimodzi mwa zigawo zofunika kwambiri pa kuyesedwa kwa diso, kuyesera kwa maso anu kudzakuthandizani dokotala wanu maso kudziwa ngati mukufunikira kuwongolera masomphenya .
Kuyesedwa kwachidziwitso chowonetsa sikumalowetsa kafukufuku wamaso . Komabe, ndi chimodzi mwa zofunikira kwambiri zomwe munthu angachite pofufuza momwe anthu amaonera.
Maonekedwe owonetsa akhoza kuyesedwa patali komanso pafupi.
Kutalikirana Kwachikondi
Kutalika kwawoneka bwino kwambiri ndiyeso ya kuchuluka kwa masomphenya. Amayesedwa poyesera chinthu chaching'ono kwambiri chimene mungachidziwe, kawirikawiri pa tchati chapafupi mamita 20 kutali. Kuyeza uku kumalembedwa ngati kachigawo kakang'ono, ndipo 20/20 kumaganiziridwa ngati masomphenya. Kutalika kwa maonekedwe akuyang'ana kawirikawiri kumayesedwa ndi kudzipatula diso lililonse ndikuyesa maso onse pamodzi. Kawirikawiri, tchati cha diso chimagwiritsidwa ntchito ndi makina osiyanasiyana a makalata omwe pang'onopang'ono amakhala ochepa komanso ochepa.
Pafupi Chiwonetsero Choyang'ana
Pafupi ndi maonekedwe abwino ndiyeso la momwe mungathe kuwonera zinthu zakufupi. Kawirikawiri imayeza pafupifupi masentimita 16, ndi njira yabwino yowunikira luso lanu lolimbana ndi ntchito monga kuwerenga kapena kusoka. Kawirikawiri, pafupi ndi maonekedwe akuyang'anitsitsa amayang'aniridwa ndi maso onse. Mudzafunsidwa kuti mukhale ndi khadi lapafupi pafupi ndi mainchesi 16 ndikuwerenga mzere wawung'ono kwambiri.
Zochitika Zachidule Zowonekera
Kuchuluka kwapakati pazithunzi ndizomwe mumayendera bwino kutalika kwa kutalika kwa mkono kapena kwinakwake pakati pa mtunda ndi pafupi. Ngakhale kuti sizomwe zimayendera kafukufuku wa maso, zakhala zofunikira kwambiri kuti madokotala awonetsetse kuti akuyang'anitsitsa maonekedwe ena chifukwa ndilo mtunda umene makompyuta ambiri amaikamo.
Kodi Kukhala ndi 20/20 Masomphenya Kumatanthauza Chiyani?
Pali njira zambiri zowunikira maonekedwe abwino. Chinthu chimodzi chowoneka bwino chomwe chimagwiritsidwa ntchito nthawi zambiri ndi Snellen visual acuity, yotchedwa Dutch ophthalmologist, Herman Snellen ndipo inakhazikitsidwa mu 1862. Snellen zithunzi zooneka bwino zimayesedwa ngati kachigawo kakang'ono ndipo zimaimiridwa ngati mtunda umene mayeserowo amachitidwa patali pomwe chinthu chochepa kwambiri chomwe chimadziwika chimaphatikizapo mphindi zisanu ndi zisanu ndi zisanu ndi ziwiri ndipo tsatanetsatane wa mawonekedwewa amachititsa kuti mphindi imodzi ya arc ichitike. Chotsatira ndi kalata yoyenerera, mawonekedwe, chithunzi kapena nambala yogwiritsidwa ntchito kusonyeza nkhani yomwe ikuwonetsedwa bwino. Pogwiritsira ntchito masikiramu, mawonekedwe ndi kutalika kwa mamita pamsana pa kukula kwa kalata m'magulu a M. Choncho, 6/6 ndi ofanana ndi 20/20.
20/20 zooneka bwino zikutanthauza kuti munthu akhoza kuona zinthu zochepa kuchokera pamapazi 20 kutalimodzi ndi munthu yemwe ali ndi maso abwinobwino amakhoza kuwona kuchokera pa mapazi makumi awiri. Ngati munthu ali ndi chidziwitso cha 20/40, amanenedwa kuti awone tsatanetsatane kuchokera pamapazi 20 kutali mofanana ndi munthu yemwe ali ndi maso abwinobwino amakhoza kuchiwona kuchokera mamita 40 kutali. Zozoloŵera kapena zowerengeka za munthu zooneka bwino zimatchedwa 20/20. Komabe, pali anthu ambiri omwe angathe kuona 20/15 ndi ochepa amene angapeze 20/10 zooneka bwino.
N'zotheka kukhala ndi masomphenya opambana kuposa 20/20: kulemera kwakukulu kwa diso la munthu popanda zithandizo zowoneka (monga mabinoculars) kawirikawiri amaganiziridwa kukhala pafupi 20/10.
Chitsime:
Association of American Optometric Association (AOA). Kuwona Zooneka: Kodi 20/20 Masomphenya ndi Chiyani? AOA, 2006-10.