Pamene tikukalamba, lenzi, yomwe ndi njira yowunikira maso athu, imayamba kuuma pang'onopang'ono ndikutaya kusinthasintha kwake, ndipo mphamvu yake yosinthira imayamba kufooka pang'onopang'ono, zomwe zimapangitsa kuti thupi likhale lolimba: presbyopia. Ngati malo oyandikira ali opitilira masentimita 30, ndipo zinthu sizikuwoneka bwino mkati mwa masentimita 30, ndipo muyenera kuyandikira kwambiri kuti muwone bwino, muyenera kuganizira kuvala magalasi a presbyopic.
Nthawi ino tikuphunzira za magalasi opitilira patsogolo a multifocal mu presbyopia optics. Pamene presbyopia ichitika, zimakhala zotopetsa kwambiri kuwona, chifukwa diso la munthu limakhala lomasuka likayang'ana patali, ndipo kuyang'ana kwambiri ndikofunikira mukayang'ana pafupi. Komabe, mphamvu yosinthira ya lens ya presbyopic ndi yofooka, ndipo kuyang'ana sikokwanira mukayang'ana pafupi, zomwe zidzawonjezera katundu m'maso. Zizindikiro monga kupweteka kwa maso, kuwona molakwika, ndi mutu ndi zizindikiro zofala.
Mfundo ya magalasi opitilira patsogolo a multifocal
Mfundo yopangira ma lens a multifocal ndikupanga malo ambiri owonera kutali, pakati komanso pafupi ndi lens imodzi. Kawirikawiri, gawo lapamwamba la lens limakhala ndi mphamvu yowonera kutali, gawo lapansi limakhala ndi mphamvu yowonera pafupi, ndipo gawo lapakati la lens ndi dera lozungulira lomwe pang'onopang'ono limaposa mphamvu yowonera. Pakati pa ma lens ambiri a multifocal pali 10-16 mm pansi pa pakati pa kuwala kutali ndi 2-2.5 mm m'mphuno. Tiyenera kudziwa kuti pali malo osinthasintha mbali zonse ziwiri za progressive zone. Pamene mzere wowonera ukupita kuderali, chinthu chowoneracho chimasokonekera, zomwe zimapangitsa kuti zikhale zovuta komanso zosasangalatsa kuwona.
Momwe mungagwiritsire ntchito ma lens a progressive multifocal
Magalasi opangidwa ndi ma multifocal pang'onopang'ono amawonjezera mphamvu kuyambira pamwamba mpaka pansi, ndipo amapereka madera atatu obisika a lens opangidwa ndi ma progressive, omwe amaphimba masomphenya akutali, apakati, ndi apafupi, zomwe zimasonyeza bwino mawonekedwe osiyanasiyana. Mukavala magalasi opangidwa ndi ma multifocal koyamba, gawo la masomphenya mbali zonse ziwiri za magalasi likhoza kusokonekera komanso kusokonekera. Pamene malo a chimango asuntha kapena kusokonekera, zingayambitsenso kusasangalala komanso kusawona bwino. Tsatirani njira ya "chete choyamba kenako sunthani, choyamba mkati kenako kunja" kuti muzichita pang'onopang'ono ndikusinthasintha.
01. Malo a lenzi ya telephoto
Mukayendetsa galimoto kapena kuyang'ana, sungani chibwano chanu mkati pang'ono, sungani mutu wanu mopingasa, ndipo yang'anani pakati pa lenzi mokwera pang'ono.
02. Malo a mandala apakati
Mukayendetsa galimoto kapena kuyang'ana, sungani chibwano chanu mkati pang'ono, sungani mutu wanu mopingasa, ndipo yang'anani pakati pa lenzi mokwera pang'ono. Mutha kusuntha khosi lanu mmwamba ndi pansi pang'ono mpaka chithunzicho chiwonekere bwino.
03. Malo oyandikira a lenzi
Mukawerenga buku kapena nyuzipepala, ikani patsogolo panu, tambasulani chibwano chanu pang'ono patsogolo, ndipo sinthani maso anu pansi ku malo oyenera agalasi.
04. Malo opanda galasi
Pali madera mbali zonse ziwiri za lenzi komwe kuwala kumasintha, ndipo gawo la masomphenya lidzasokonekera. Izi sizachilendo.
05. Malangizo:
Kukwera ndi kutsika masitepe: Tsitsani mutu wanu pang'ono ndikuyang'ana pansi, ndipo sinthani mawonekedwe anu kuchokera pamalo apafupi ndi galasi kupita kumalo apakati kapena akutali a galasi.
Kuyenda tsiku ndi tsiku: Ngati zikukuvutani kuyang'ana kwambiri, yesani kuyang'ana mita imodzi patsogolo kuti musinthe momwe mukuganizira. Chonde tsitsani mutu wanu pang'ono mukamayang'ana pafupi.
Kuyendetsa kapena kugwiritsa ntchito makina: Ngati mukufuna kuyang'ana kuchokera kutali mpaka pafupi, m'mbali kapena kuchokera mbali zosiyanasiyana pamene mukugwira ntchito, chonde chitani izi pokhapokha mutazolowera bwino ma lens opita patsogolo.
Nthawi yotumizira: Disembala-01-2023