● Ma te whakamahi i te hangarau whakahaere whakaheke i te taha, ka heke te kaha o te arotahi mai i te pokapu whatu ki te taha o te arotahi, he pai te whakaiti i te ahuatanga o te hyperopia defocus, na reira ka whakaroa i te roanga o te tuaka kanohi me te whakaheke i te whanaketanga o te myopia.
● I whakamahia te rorohiko whatu ki te tatau i te ahua whakaahua o te arotahi i te wa i utua ai te hihi matua e te mana dioptric i te wa e matapaetia ana te arotahi, me te hoahoa papai o te arotahi i mahia i runga i te mea kei roto te whakaahua retinal peripheral. he ahua defocus myopic.
● Ma te whakamahi i te taputapu hangarau anti-puru puru, ka taea e ia te aukati i te neke atu i te 25% o te rama kikorangi me te 99% o nga hihi ultraviolet me etahi atu radiation kino.