Seo ho thoeng ke lense e sebetsang e bua ka likhalase tse khethehileng tse ka tlisang litšobotsi tse itseng tse ntle mahlong a batho ba itseng libakeng tse itseng le mekhahlelo, 'me li ka fetola maikutlo a pono le ho etsa hore moeli oa pono o phutholohe, o hlakileng le o bonolo.
Lilense tse fetolang mebala: ho lelekisa maikutlo a feshene, a loketseng myopia, hyperopia, astigmatism, 'me a batla ho roala likhalase tsa letsatsi ka nako e le ngoe. Lilense tsa Hanchuang tse mebala e felletseng li fetola 'mala kapele ka tlung le kantle, li hanela leseli la UV le boputsoa, ha li pholile haholo!