Incazelo Yesiginali ye-Defocus
I-"Defocus" isignali yempendulo ebalulekile ebonakalayo engashintsha iphethini yokukhula yenhlamvu yeso ekhulayo.Uma ukukhuthazwa kwe-defocus kunikezwa ngokugqoka amalensi ngesikhathi sokuthuthukiswa kweso, iso lizothuthukela endaweni yesignali ye-defocus ukuze kuzuzwe i-emmetropia.
Isibonelo, uma i-concave lens igqokwa esweni elikhulayo ukuze ifake i-defocus engalungile (okungukuthi, ukugxila kungemuva kwe-retina), ukuze ukugxila kuwele ku-retina, inhlamvu yeso izokhula ngokushesha, okuzothuthukisa ukuthuthukiswa kwe-myopia.Uma i-lens ye-convex igqokwe, iso lizothola i-defocus enhle, izinga lokukhula kwe-eyeball lizohamba kancane, futhi lizothuthukela ku-hyperopia.
Iqhaza Lezimpawu Ze-Defocus
Kutholakala ukuthi amasignali e-defocus we-peripheral retina adlala indima ebalulekile ekulawuleni ukukhula nokuthuthukiswa kwe-eyeball, ikakhulukazi lapho amasignali okubukwayo aphakathi nendawo kanye ne-peripheral angahambisani, amasignali e-peripheral azobusa.Ngamanye amazwi, amasiginali we-peripheral defocus anomthelela omkhulu ekulawuleni i-emmetropization kunesimo esimaphakathi se-defocus!
Abacwaningi bakholelwa ukuthi uma ugqoke izibuko ezivamile zokubona okukodwa, ukugxila okumaphakathi kuthathwa ku-retina, kodwa ukugxila kwe-peripheral kuthathwa ngemuva kwe-retina.I-peripheral retina ithola isignali ye-hyperopic defocus, eyenza i-eksisi yamehlo ikhule futhi i-myopia ijule.
Umklamo wezibuko ze-defocus
Izingilazi ze-multi-point micro-transmission defocus ziklanywa futhi zenziwa ngokuvumelana nesimiso se-peripheral myopia defocus, ukuze isithombe se-peripheral siwele phambi kwe-retina.Ngalesi sikhathi, ulwazi oludluliselwa ku-eyeball luzonciphisa ukukhula kwe-axis yamehlo.Ucwaningo oluhlukene lubonise ukuthi umphumela wayo wokulawula i-myopia uhlotshaniswa kahle nesikhathi sokugqoka, futhi kunconywa ukuthi uyigqoke amahora angaphezu kwangu-12 ngosuku.
Ucwaningo ngesilinganiso esikhulu se-optical defocus myopia lubonisa ukuthi i-defocus ebona kude yezithombe ze-retina isheshisa ukukhula kwebhola leso, okuholela ekwelulweni kwebhola leso kanye nokukhula kwe-myopia.Ngokuphambene, i-defocus yokubona eduze kwezithombe ze-retina ibambezela ukukhula kwenhlamvu yeso.Indawo okugxilwe kuyo ewela phambi kwe-retina ngenxa yokungaboni kahle eduze ingabambezela ukukhula kwenhlamvu yeso kodwa ayikwazi ukufinyeza ubude be-axial.
Entsha enobude be-eksisi yeso obungeqi ku-24mm, i-myopic defocus ehlanganisiwe yokuvimbela nokulawula ingaqinisekisa ubude be-eksisi yeso lapho umuntu esekhulile.Kodwa-ke, kubantu abanobude be-eksisi yeso obudlula u-24mm, ubude be-axial abukwazi ukufinyezwa.
Imishayo yokukhanya yamalensi amancanyana kumalensi engilazi yamehlo yenza amasignali e-myopic defocus ngaphakathi kweso, okuwukhiye ekudambiseni ukukhula kwe-myopia.Nokho, ukuba khona kwamalensi amancane kumalensi akuqinisekisi ukusebenza kahle;ama-micro-lens kumele aqale asebenze ngempumelelo.Ngakho-ke, ubuchwepheshe bokukhiqiza nokucubungula amalensi amancane kumalensi nawo avivinya ubuciko nobuchwepheshe bezinkampani ezikhiqizayo.
Idizayini yama-Multi-Focus Micro-Lens
Ngokuvela "kwethiyori ye-defocus," abakhiqizi bamalensi abakhulu bakhiqize izinhlobo ezahlukahlukene zamalensi e-defocus.Eminyakeni emibili eyedlule, amalensi e-multi-focus micro-lens defocus nawo aqalisiwe ngokulandelana kwawo.Nakuba wonke engamalensi e-multi-focus defocus, kunomehluko omkhulu ekwakhiweni kanye nenani lamaphoyinti okugxilwa kuwo.
1. Ukuqonda ama-Micro-Lens
Lapho ugqoke izibuko zamehlo ezibona kanye, ukukhanya okuvela kude kungawela ku-fovea, ingxenye emaphakathi ye-retina.Nokho, ukukhanya okuvela endaweni ezungezile, ngemva kokudlula ilensi eyodwa, akufinyeleli endizeni efanayo ye-retina.Njengoba i-retina ine-curvature, izithombe ezisuka endaweni ezungezile ziwela ngemva kwe-retina.Kuleli qophelo, ubuchopho buhlakaniphe kakhulu.Lapho ithola lesi sikhuthazi, i-retina izohamba ngokuzenzakalelayo iye emfanekisweni wento, ibangele ukuthi inhlamvu yeso ikhule ihlehle, okubangele izinga le-myopia ukuthi likhule ngokuqhubekayo.
Kubalulekile ukuqaphela:
1. I-retina inomsebenzi wokukhulela esithombeni.
2. Uma isithombe se-cornea emaphakathi siwela endaweni ye-retina, kuyilapho isithombe se-peripheral siwela ngemva kwe-retina, siyobangela ukungaboni kahle kokubona kude.
Umsebenzi wamalensi amancanyana ukusebenzisa umgomo wokuguqula ukukhanya ngelensi ephozithivu eyengeziwe endaweni ukudonsa izithombe eziwumngcele ukuya ngaphambili kweretina.Lokhu kuqinisekisa ukubona okumaphakathi okucacile kuyilapho kuvumela izithombe eziseceleni ukuba ziwe engxenyeni engaphambili ye-retina, okudala ukudonsa ku-retina ngezinjongo zokuvimbela nokulawula.
Kubalulekile ukuqaphela:
1. Kungakhathaliseki ukuthi i-peripheral defocus lens noma i-multi-focus micro-lens, zombili zidonsa izithombe ze-peripheral ngaphambi kwe-retina ukuze zenze i-peripheral myopic defocus kuyilapho igcina ukubona okucacile okumaphakathi.
2. Umthelela uyahlukahluka kuye ngenani le-defocus yezithombe ezizungezile eziwela ngaphambili kwe-retina.
2. Idizayini yamalensi ama-Micro-Concave
Ekubukeni kwamalensi e-micro-defocus agxile kakhulu, singabona amaphuzu amaningi e-micro-defocus, akhiwe ngamalensi angama-concave angawodwana.Uma kucatshangelwa izinqubo zamanje zokuklama, amalensi e-concave angahlukaniswa abe: amalensi ayindilinga amandla angawodwa, amalensi aphansi angewona ama-micro-defocus, namalensi aphezulu angewona ama-micro-defocus (nomehluko omkhulu wamandla phakathi kwesikhungo nendawo ezungezile).
1. Umthelela wokuthwebula amalensi aphezulu angewona ama-micro-defocus uhlangabezana nokulindelwe, uhlinzeka ngokulawula okungcono kwe-myopia.
2. Ukufiphazwa "kwezithombe" ezingagxilile: Amalensi aphezulu angewona ama-micro-defocus adala imisebe yokukhanya engagxili futhi ephambukayo.Uma isignali ephambi kwe-retina icace kakhulu, ingase ikhethwe njengesignali yokubuka eyinhloko ukuze ibukwe eduze, okubangele ukuthi izithombe ezilandelayo zingagxili ekuboneni kude.
Izinzuzo zokusebenzisa amalensi aphezulu angewona ama-micro-defocus:
1. Ukudala ubunzima be-imaging for the brain by not make focus, izingane ngeke zigxile ekusebenziseni ama-micro-lens, kodwa zizokhetha ngokuzenzakalelayo ukugxila ezingxenyeni ezicacile phakathi kwendawo emaphakathi nendawo ezungezile.
2. Ukudala i-myopic defocus enobubanzi nogqinsi, okuholela ekudonsekeni okuqinile kanye nokusebenza okuthuthukisiwe kokulawula i-myopia.
3. Izingozi Zokubuka Ngama-Micro-Concave Lens
Ukukhathazeka okukhulu ngamalensi okulawula i-myopia anama-micro-lens ukuthi izingane zingase zigxile ezintweni ezisebenzisa amalensi amancane, angaba nemiphumela emibi elandelayo:
1. Ukukhethwa kokubuka eduze njengesignali ebonakalayo eyinhloko
2. Ukungaboni kahle kwezinto
3. Ukugqoka isikhathi eside kuthinta ukulungiswa
4. Okuholela ekulungiseni okungavamile nasekufaniseni ukuhlangana
5. Ukulawulwa kwe-myopia okungasebenzi lapho ubuka izinto eziseduze
Ekuphetheni
Ngezinhlobonhlobo ezikhulayo zamalensi e-multi-focus micro-defocus, ukukhetha efanele kuba inselele.Kungakhathalekile idizayini yelensi, umgomo uwukwenza isithombe esicacile ku-retina kuyilapho ugcina isignali ye-myopic defocus eqhubekayo futhi ezinzile phambi kwe-retina ukuze kwehliswe ukuqhubekela phambili kwe-myopia kanye ne-eye axial elongation.Ubuciko, ubuchwepheshe, kanye nokuqinisekiswa kwekhwalithi yamalensi e-multi-focus micro-defocus kubalulekile.Amalensi ekhwalithi engeyinhle awehluleki nje kuphela ukwehlisa isivinini se-myopia nokunwebeka kwe-axial kodwa ukugqoka isikhathi eside kungase kuthinte ukulungiswa, okuholela ekufaniseni ukuhlangana okungavamile.
Isikhathi sokuthumela: Jun-21-2024