01 Kwa ojambula, ojambula mavidiyo, ndi akatswiri ena omwe amadalira ma optics omveka bwino pa ntchito yawo, nsalu yoyeretsayi ndi yofunika kwambiri. Magalasi a makamera, zowonera patali, ma binoculars, ndi zida zina zolondola zimafunikira kuyeretsedwa pafupipafupi kuti zigwire bwino ntchito. Nsalu yotsuka ya Zhihe, yokhala ndi zida zake zapadera komanso kapangidwe kake, imatha kuchotsa dothi, fumbi, ndi zala mosavuta, ndikuwonetsetsa kuti zithunzi zowoneka bwino komanso zakuthwa zimawonekera.
Kuphatikiza apo, nsalu yoyeretsera iyi ndiyabwino kwa mabizinesi ndi mabungwe omwe amapereka magalasi kapena ntchito zokhudzana ndi ma optics. Malo ogulitsira opangira magalasi, zipatala za ophthalmology, kapena bizinesi iliyonse yomwe imapereka ntchito zoyeretsera magalasi amatha kupindula pogwiritsa ntchito nsaluyi. Kuchita bwino kwake pakuyeretsa ndi kapangidwe kake kokongola kumatha kukulitsa kukhutira kwamakasitomala ndikusiya chidwi chokhalitsa.