Lens ya Photochromic ni lens yijimye iyo ihuye nurumuri ultraviolet (UV). Izi lens zifite ikintu cyihariye kirinda amaso yawe urumuri rwa UV rwijimye. Ibirahuri bigenda byijimye buhoro buhoro muminota mike iyo uri mwizuba.
Igihe cyo kwijimye kiratandukana kubirango nibindi bintu byinshi nkubushyuhe, ariko mubisanzwe byijimye muminota 1-2, bikabuza hafi 80% yumucyo wizuba. Lens ya fotochromic nayo yoroshye kugirango isobanuke neza mugihe imbere muminota 3 kugeza 5. Zizahinduka umwijima mugihe igice cyerekanwe nurumuri UV - nko kumunsi wijimye.
Ibirahuri nibyiza mugihe winjiye kandi usohoka UV (urumuri rwizuba) burigihe.
Lens yubururu ifotora yubururu yagenewe intego zitandukanye, zifite ubushobozi bwo guhagarika urumuri rwubururu.
Mugihe urumuri rwa UV nu rumuri rwubururu atari ikintu kimwe, urumuri rwubururu rushobora kwangiza amaso yawe, cyane cyane binyuze mumara igihe kinini mumashusho ya digitale hamwe nizuba ryizuba. Umucyo wose utagaragara kandi ugaragara igice urashobora kugira ingaruka mbi kubuzima bwamaso yawe. Lens yubururu ifotora irinda ingufu nyinshi kurwego rwumucyo, bivuze ko irinda kandi urumuri rwubururu kandi ni byiza gukoresha mudasobwa.
Lens igenda itera imbere ni tekinoroji yateye imbere nayo izwi nka no-bifocals. Kuberako, bikubiyemo impamyabumenyi yarangije iyerekwa itandukanye kuva mukarere ka kure kugera hagati no hagati ya zone, bigafasha umuntu kureba kure nibintu byegeranye nibintu byose hagati yacyo. Birahenze ugereranije na bifocals ariko ikuraho imirongo igaragara mumurongo wa bifocal, byemeza neza.
Abantu barwaye Myopia cyangwa hafi yo kureba, barashobora kungukirwa nubu bwoko bwa lens. Kuberako, muriyi miterere, urashobora kureba ibintu byegeranye neza ariko biri kure bizagaragara neza. Niyo mpamvu, lens igenda itera imbere ikosora ahantu hatandukanye kandi ikagabanya amahirwe yo kubabara umutwe hamwe nijisho ryatewe no gukoresha mudasobwa no guswera.