Tanthauzo la Defocus Signal
"Defocus" ndi chizindikiro chofunikira chowunikira chomwe chingasinthe kukula kwa diso lomwe likukula. Ngati kukondoweza kwa defocus kumaperekedwa ndi kuvala ma lens panthawi ya kukula kwa diso, diso limakula molunjika pamalo a chizindikiro cha defocus kuti akwaniritse emmetropia.
Mwachitsanzo, ngati lens ya concave imavala pa diso lomwe likukulirakulira kuti lipangitse kufooketsa koyipa (ndiko kuti, kuyang'ana kumbuyo kwa retina), kuti chidwi chigwere pa retina, diso limakula mwachangu, zomwe zingalimbikitse. kukula kwa myopia. Ngati mandala owoneka bwino amavalidwa, diso lidzalandira defocus yabwino, kukula kwa diso kumachedwetsa, ndipo imayamba kupita ku hyperopia.
Udindo wa Zizindikiro za Defocus
Zimapezeka kuti zizindikiro za defocus za peripheral retina zimagwira ntchito yofunika kwambiri pakuwongolera kukula ndi chitukuko cha diso, makamaka pamene zizindikiro zowoneka zapakati ndi zozungulira sizikugwirizana, zizindikiro zozungulira zidzalamulira. Mwa kuyankhula kwina, zizindikiro za peripheral defocus zimakhudza kwambiri malamulo a emmetropization kuposa dziko lapakati la defocus!
Ofufuza amakhulupirira kuti mukamavala magalasi owoneka amodzi, chinthu chapakati chimawonetsedwa pa retina, koma zotumphukira zimawonekera kumbuyo kwa retina. Retina yozungulira imalandira chizindikiro cha hyperopic defocus, chomwe chimapangitsa kuti diso likule komanso myopia kuzama.
Mapangidwe a magalasi a defocus
Multi-point micro-transmission defocus magalasi amapangidwa ndi kupangidwa molingana ndi mfundo ya zotumphukira myopia defocus, kotero kuti zotumphukira chithunzi akhoza kugwa kutsogolo kwa retina. Panthawiyi, chidziwitso chomwe chimaperekedwa ku diso chidzachepetsa kukula kwa diso. Kafukufuku wosiyana wasonyeza kuti mphamvu yake yolamulira myopia imagwirizana bwino ndi nthawi yovala, ndipo tikulimbikitsidwa kuvala kwa maola oposa 12 patsiku.
Kafukufuku pamlingo waukulu wa optical defocus myopia akuwonetsa kuti kuyang'ana kutali kwa zithunzi za retina kumathandizira kukula kwa diso, zomwe zimapangitsa kuti diso litalike komanso kukula kwa myopia. Mosiyana ndi zimenezi, pafupi ndi maso a defocus a retina amachepetsa kukula kwa diso. Malo omwe akugwera kutsogolo kwa retina chifukwa cha kuyandikira pafupi ndi maso amatha kuchepetsa kukula kwa diso koma sangathe kufupikitsa kutalika kwa axial.
Kwa achinyamata omwe ali ndi utali wozungulira wa diso osapitirira 24mm, njira yabwino kwambiri ya myopic defocus yopewera komanso yowongolera imatha kutsimikizira kutalika kwa diso pakakula. Komabe, kwa anthu omwe ali ndi utali wa diso lopitirira 24mm, kutalika kwa axial sikungafupikitsidwe.
Kuwala kwa ma lens ang'onoang'ono pamagalasi amaso kumapanga zizindikiro za myopic defocus mkati mwa diso, zomwe ndizofunikira kuchepetsa kukula kwa myopia. Komabe, kukhalapo kwa magalasi ang'onoang'ono pamagalasi sikutanthauza kugwira ntchito; magalasi ang'onoang'ono ayenera kugwira ntchito moyenera. Chifukwa chake, ukadaulo wopanga ndi kukonza ma lens ang'onoang'ono pamagalasi amayesanso luso ndiukadaulo wamakampani opanga.
Mapangidwe a Multi-Focus Micro-Lens
Ndi kutuluka kwa "defocus theory," opanga magalasi akuluakulu apanga mitundu yosiyanasiyana ya magalasi a defocus. M'zaka ziwiri zapitazi, ma lens ang'onoang'ono a micro-lens defocus adayambitsidwanso imodzi pambuyo pa imzake. Ngakhale kuti onse ndi ma lens a multifocus defocus, pali kusiyana kwakukulu pamapangidwe ndi kuchuluka kwa mfundo zomwe zimayang'ana.
1. Kumvetsetsa kwa Micro-Lens
Mukavala magalasi a maso amodzi, kuwala kochokera chapatali kumatha kugwera pa fovea, pakatikati pa retina. Komabe, kuwala kochokera m'mbali mwake, pambuyo podutsa mu lens imodzi, sikufika pa ndege yomweyo ya retina. Popeza retina imakhala yopindika, zithunzi zochokera m'mphepete mwake zimagwera kumbuyo kwa retina. Panthawi imeneyi, ubongo ndi wochenjera kwambiri. Akalandira chokondoweza ichi, retina adzakhala mwachibadwa kusuntha kwa fano la chinthu, kuchititsa diso kukula chammbuyo, kuchititsa mlingo wa myopia mosalekeza kuwonjezeka.
Ndikofunika kuzindikira:
1. Retina ili ndi ntchito yokulira molunjika ku chithunzi.
2. Ngati chithunzi cha cornea chapakati chigwera pa retina, pomwe chithunzi cham'mphepete chimagwera kumbuyo kwa retina, chimapangitsa kuti munthu asaone bwino.
Ntchito ya ma lens ang'onoang'ono ndikugwiritsa ntchito mfundo yosinthira kuwala ndi ma lens owonjezera omwe ali m'mphepete mwake kuti akoke zithunzi zozungulira kutsogolo kwa retina. Izi zimatsimikizira kuwona bwino kwapakati pomwe zimalola zithunzi zotumphukira kugwera kutsogolo kwa retina, ndikupanga kukopa kwa retina pofuna kupewa komanso kuwongolera.
Ndikofunika kuzindikira:
1. Kaya ndi peripheral defocus lens kapena multifocus micro-lens, onse amakoka zithunzi zozungulira kutsogolo kwa retina kuti apange zotumphukira za myopic defocus ndikusunga masomphenya omveka bwino apakati.
2. Zotsatira zimasiyanasiyana malinga ndi kuchuluka kwa defocus kwa zithunzi zotumphukira zomwe zikugwera kutsogolo kwa retina.
2. Mapangidwe a Ma Lens a Micro-Concave
M'mawonekedwe a multifocus micro-defocus lens, timatha kuwona mfundo zambiri za micro-defocus, zomwe zimapangidwa ndi ma lens a concave pawokha. Poganizira za mapangidwe amakono, ma lens a concave amatha kugawidwa kukhala: ma lens amphamvu amodzi ozungulira, ma lens otsika omwe alibe ma micro-defocus, ndi magalasi apamwamba a non-micro-defocus (okhala ndi kusiyana kwakukulu pakati papakati ndi zozungulira).
1. Kujambula kwa magalasi apamwamba a non-micro-defocus kumakwaniritsa zoyembekeza, kupereka kuwongolera bwino kwa myopia.
2. Kusawoneka bwino kwa "zithunzi" zosasunthika: Magalasi apamwamba osawona ang'onoang'ono amatulutsa kuwala komwe sikumayang'ana komanso kumapatukana. Ngati chizindikiro cha kutsogolo kwa retina ndi chomveka bwino, chikhoza kusankhidwa ngati chizindikiro choyambirira chowonera pafupi, zomwe zimapangitsa kuti zithunzi zotsatila zikhale zowona kutali.
Ubwino wogwiritsa ntchito magalasi apamwamba a non-micro-defocus:
1. Kupanga zovuta zamaganizidwe ku ubongo posapanga chidwi, ana sangayang'ane pogwiritsa ntchito ma lens ang'onoang'ono, koma amasankha okha kuyang'ana mbali zomveka bwino pakati pa chigawo chapakati ndi periphery.
2. Kupanga myopic defocus ndi m'lifupi ndi makulidwe, zomwe zimatsogolera ku mphamvu yokoka komanso kuwongolera bwino kwa myopia.
3. Zowopsa Zowonera ndi Ma Lens a Micro-Concave
Chodetsa nkhawa kwambiri ndi ma lens owongolera myopia okhala ndi ma lens ang'onoang'ono ndikuti ana amatha kuyang'ana kwambiri zinthu zomwe zimagwiritsa ntchito magalasi ang'onoang'ono, zomwe zitha kukhala ndi zotsatirazi:
1. Kusankha kuwonera pafupi ngati chizindikiro chachikulu
2. Kusawona bwino kwa zinthu
3. Kuvala kwanthawi yayitali kumakhudza kusintha
4. Zomwe zimatsogolera kukusintha kwachilendo komanso kufananiza kolumikizana
5. Kuwongolera kosagwira mtima kwa myopia mukamawona zinthu zapafupi
Pomaliza
Ndi kuchuluka kwa magalasi a Micro-defocus, kusankha yoyenera kumakhala kovuta. Mosasamala kanthu za mapangidwe a lens, cholinga chake ndi kupanga chithunzi chomveka bwino pa retina ndikusunga chizindikiro chokhazikika komanso chokhazikika cha myopic defocus kutsogolo kwa retina kuti muchepetse kupitirira kwa myopia ndi diso la axial elongation. Katswiri, ukadaulo, komanso kutsimikizika kwamtundu wamagalasi a Micro-defocus ndikofunika kwambiri. Magalasi osawoneka bwino amangolephera kuchepetsa kufalikira kwa myopia ndi kutalika kwa axial koma kuvala kwanthawi yayitali kumatha kusokoneza kusintha, zomwe zimatsogolera kufananiza kwachilendo.
Nthawi yotumiza: Jun-21-2024