Malensi akuluakulu

Zaka makumi angapo zapitazo, makina olimba anali opangidwa ndi polymethylmethacrylate kapena galasi. Iwo sanaphonye mpweya ndipo anali osasangalatsa kwambiri kuvala, chifukwa ankayenera kuwiritsa nthawi ndi nthawi ndikuchitidwa ndi oyeretsa apadera. Masiku ano, makina opangidwira ovuta amapangidwa ndi zipangizo zopangidwa pogwiritsa ntchito silicone. Iwo ali ndi mpweya wokwanira wokwanira komanso amakhala ndi makhalidwe abwino.

Ubwino wa ma lenti ovuta

Zilonda zamakono zothandizira kukonzekera masomphenya zili ndi ubwino wotere:

1. Kukhalitsa - popeza zinthu zomwe amapanga ndizowona, zimagwira bwino mawonekedwe ake.
2. Kukhazikika kwazithunzi - zinthuzi sizimagwedezeka pamene zimanyezimiritsa, choncho chithunzicho chimakhala chowonekera nthawi zonse.
3. Kulimbana ndi mapuloteni amadzimadzi - amatsutsana ndi zinthu zomwe zimafika pamtunda kuti zisatuluke madzi, kotero nthawi yodzikongoletsa ndi yowona bwino ya lenses imakula kwambiri.
4. Zing'onozing'ono - izi zimapangitsa malo ozungulira a cornea kukhala otseguka kuti apeze okosijeni ndi misozi yomwe imatsuka maselo akufa ndi magawo ang'onoang'ono akunja.
5. Kukhalitsa - moyo wamasiku onse ovuta komanso masewera a masana ndi ochepa chabe chifukwa cha kusintha kwa masomphenya a wogwiritsa ntchito.

Kuonjezerapo, optics izi zothandizira alibe madzi. Sumawuma pamphepo kapena nyengo yotentha, yomwe imakulolani kuti musagwiritse ntchito madontho.

Ndibwino kuti muzivala zovala zamagetsi?

Nthawi zina, makilogalamu amphamvu, yopangidwa ndi maziko a silicone, amapereka masomphenya abwino kuposa osiyana nawo. Optics chotero makamaka amagwiritsidwa ntchito:

• kukonzekera kwa orthokate;
• kutchulidwa monga astigmatism (ngati kukonzekera koyenera ndi lens zofewa sizingatheke);
• zaka;
• keratoconus (corneal disease, yomwe yatsekedwa kapena yopunduka).