Saense e tummeng ea mefuta ea likhalase tse teng 'marakeng hona joale

Likhalase tsa ho bala:
Kamoo e sebetsang kateng: Li sebelisoa ho lokisa presbyopia, lilense tsa likhalase tsa ho bala ke lilense tse kobehileng tse thusang mahlo hore a tsepame.
Mofuta: Likhalase tsa ho bala li le mong, li ka bona haufi; Ho na le likhalase tsa ho bala tse peli kapa tse fapaneng, tse ka fihlelang litlhoko tsa ho bona hole le ho koala ka nako e le 'ngoe.

Likhalase tsa letsatsi:
Mosebetsi: E sebelisoa haholo-holo ho thibela mahlaseli a letsatsi le mahlaseli a ultraviolet ho fokotsa tšusumetso le tšenyo ea khanya ea letsatsi mahlong.
'Mala oa lense: Mebala e fapaneng ea lilense e loketse tikoloho le mesebetsi e fapaneng. Ka mohlala, lilense tse bohlooho li fana ka kutloisiso ea 'mala oa tlhaho' me li loketse maemo a sa tšoaneng a khanyang; Lilense tse sootho li eketsa phapang ea mebala ha li ntse li fokotsa khanya, e loketseng ho khanna le liketsahalo tse ling; Lilense tse mosehla li ntlafatsa phapang, phello ea pono e molemo maemong a tlaase kapa a koahetsoeng ke maru, a atisang ho sebelisoa bakeng sa ski, ho tšoasa litlhapi le lipapali tse ling.

Likhalase tse fetolang mebala:
Molao-motheo: Lense e na le lintho tse khethehileng tsa lik'hemik'hale (tse kang silver halide, joalo-joalo), ka mahlaseli a mahlaseli a kotsi kapa a matla a khanyang a tla etsahala lik'hemik'hale, etsa hore 'mala oa lense o be lefifi; Ha leseli le fokotsehile, karabelo e khutlisetsoa morao, 'me' mala oa lense butle-butle o fetoha o bobebe le o hlakileng.
Melemo: Likhalase tse peli li ka khotsofatsa litlhoko tsa tšebeliso ea ka tlung le ka ntle ka nako e le 'ngoe, tse loketseng le tse potlakileng, li qoba bothata ba ho fetola likhalase khafetsa.