Ngaba ujonge isakhelo se-optical sakudala nesiphucukileyo?Jonga isakhelo se-acetate supra samadoda esineqokobhe elinesitayile sofudo emilenzeni.Imilo engqukuva ithandeka kwihlabathi jikelele kwaye isitayile se-supra songeza uchuku lwangoku kuyilo lwakudala.