Lilense tsa Photochromic li entsoe ka bohlale ho ikamahanya le maemo ho tloha ho hlakileng ho ea ho lefifi (le ka tsela e fapaneng). Lense e sebelisoa ke lebone la UV mme e felisa tlhoko ea ho lula u chencha lipakeng tsa likhalase tsa hau tsa mahlo le likhalase tsa letsatsi. Lilense tsena li fumaneha bakeng sa Pono e le 'Ngoe, bifocal le Progressive.
Lilense tsa bifocal li na le tokiso ea pono ea hole karolong e ka holimo ea lense le ho lokisa pono e haufi ka tlase; e phethahetseng haeba o hloka thuso ka bobeli. Lense ea mofuta ona e etselitsoe ho sebetsa ka mokhoa o bonolo joalo ka likhalase tsa ho bala le likhalase tsa mahlo tse fanoeng ke ngaka.
Lilense tsa bifocal li sebetsa ka ho fana ka litaelo tse peli tse fapaneng lenseng e le 'ngoe. Ha u sheba ka hloko mofuta ona oa lense u tla bona mola ho tšela bohareng; mona ke moo ditaelo tse pedi tse fapaneng di kopanang teng. Kaha re na le tšekamelo ea ho sheba fatše ha re bala buka kapa re sheba lifono tsa rona, karolo e ka tlaase ea lense e etselitsoe ho thusa ho bala.
Leseli le leputsoa, le hlahisoang ke letsatsi, empa hape le ho tsoa ho li-skrini tsa dijithale tseo re seng re ikamahantse le tsona, ha li bake feela khatello ea mahlo (e ka bakang hlooho e opang le pono e lerootho) empa hape e ka sitisa potoloho ea hau ea boroko.
Boithuto bona, bo phatlalalitsoeng ka Phuptjane 2020, bo fumane hore batho ba baholo ba qeta lihora tse 4 le metsotso e 54 ho laptop pele ho koaloa le lihora tse 5 le metsotso e 10 kamora moo. Ba qetile lihora tse 4 le metsotso e 33 ho smartphone pele ho koaloa, le lihora tse 5 le metsotso e 2 kamora moo. Nako ea skrine e nyolohile bakeng sa ho shebella thelevishene le ho bapala hape.
Ha u roala lilense tsa "blue block photochromic", ha u fumane melemo ea boiketlo feela; o lebela mahlo a hao kgahlanong le kgahlamelo e feteletseng ya lesedi le leputswa. 'Me moralo oa Bifocal o u qobisa bothata ba ho nka likhalase tse peli tsa likhalase haeba u na le bothata ba khalase e le' ngoe bakeng sa tšebeliso e haufi le e 'ngoe bakeng sa tšebeliso ea batho ba bonelang hōle.