HI Mommy V, mas better po if every 6mos ipacheck ung mata ni Ayi, kapag bumaba kahit .5 lang, papalitan niyo na po. I know magastos pero laking tulong po non. That's what I learn after wearing glasses for almost 10 years. Anyway, if maayos pa naman po ung frame ng glasses pwede naman pong gamitin ulit yun with new set of lenses.