Odwala akamapita kwa Oweptomist, ayenera kupanga zisankho zingapo. Ayenera kusankha pakati pa magalasi olumikizana kapena magalasi amaso. Ngati magalasi amaso amakonda, ndiye kuti ayenera kusankha mafelemu ndi magalasi inunso.
Pali mitundu yosiyanasiyana ya mandala, mwachitsanzo, masomphenya amodzi, mandala komanso opita patsogolo. Koma odwala ambiri sangadziwe ngati akufunika magalasi a bifocal kapena opita patsogolo, kapena magalasi amodzi okha ndi okwanira kupereka masomphenya omveka bwino. Nthawi zambiri, magalasi amodzi amawonetseko ndi mandala wamba omwe anthu ambiri amavala pomwe amayamba kuvala magalasi. Kwenikweni anthu ambiri safunika kuda nkhawa ndi magalasi a bifocal kapena opita patsogolo mpaka mutakhala okalamba 40 kapena okulirapo
Pansipa pali chidziwitso chovuta kuti mudziwe kuti magalasi omwe ali oyenera, kuphatikizapo mawonekedwe onse owala komanso mtengo wake.
Magalasi amodzi
Ubwino
Mtundu wotsika mtengo kwambiri, womwe umagwiritsidwa ntchito pokonzanso patali ndi luso.
Nthawi zambiri palibe nthawi yosintha yomwe ikufunika kuzolowera.
Mandala otsika mtengo kwambiri
Zovuta
Konzani zakuya zingapo zokhazokha, pafupi kapena.
Ma lees a bifocal
Ubwino
Gawo lowonjezera limapereka kuwongolera pang'ono ndi kuwongolera.
Mtengo woyenera yankho la kuchepa kwamalingaliro angapo.
Zotsika mtengo, makamaka poyerekeza ndi mandala opita patsogolo.
Zovuta
Bwalo losiyana, lozungulira la osagwirizana ndi theka lokhala ndi mandala a mandala.
Chithunzi chodumpha mukamasinthira kuchokera kutali kupita kumbali ndi kumbuyo.
Magulu azoyenda
Ubwino
Ma leve opita patsogolo amapereka pafupi, pakati, ndi kuwongolera kwanthawi yayitali.
Chotsani kufunika kosintha pakati pa magalasi ambiri.
Palibe mizere yowoneka pa mandala kuti isinthe mawonekedwe pakati pa madera atatu.
Zovuta
Nthawi yosintha imafunikira kuphunzitsa odwala pogwiritsa ntchito mawonedwe atatu a masomphenyawo.
Ogwiritsa ntchito atsopano amatha kumva kuti ndi okondana kapena mwamwambo mpaka atazolowera.
Okwera mtengo kwambiri kuposa malingaliro amodzi kapena mandala a bitocal.
Tikukhulupirira kuti chidziwitso pamwambapa ndi chothandiza kwa inu kuti mumvetse bwino za mitundu yosiyanasiyana ya mandala, komanso mtengo wake. Komabe, njira yabwino kwambiri yodziwira kuti mandala ndikukambirana ndi akatswiri a Oprometor. Amatha kuwunika bwino za thanzi lanu la maso ndi masomphenya anu, ndipo amalimbikitsa yoyenera kwambiri.