Focometer yonyamula yolembedwa ndi Zhihe yoyezera magalasi agalasi

Focometer yonyamula ndi chipangizo chophatikizika, chopepuka, komanso chosavuta kugwiritsa ntchito chomwe chidapangidwa kuti chizitha kuyeza mwachangu komanso molondola mphamvu ya magalasi owonera. Chida chothandizachi ndi choyenera kwa akatswiri a maso, optometrist, ndi ogulitsa zovala zamaso, chifukwa chimapereka chidziwitso chofunikira pamayendedwe olondola a zovala zamaso. Ndi kusuntha kwake komanso kugwiritsa ntchito mosavuta, mita ya diopter imatsimikizira kuyeza kwa lens koyenera komanso kolondola nthawi iliyonse, kulikonse, kumapangitsa kuti makasitomala azikhala okhutira komanso ntchito yabwino.