Lens chinhu chakajeka chine chimwechete kana kupfuura chakakombama chakagadzirwa nezvinhu zvemaziso segirazi kana resin. Mushure mekupenya, inowanzounganidzwa mumagirazi ane furemu yegirazi kugadzirisa chiono chemushandisi uye kuwana nzvimbo yakajeka yekuona.
Ukobvu hwelenzi hunonyanya kuenderana nerefractive index uye degree relens. Myopic lenzi dzakatetepa pakati uye dzakakora kumativi ose, nepo hyperopic lenzi ari zvinopesana. Kazhinji iyo yakakwirira dhigirii, iyo lens yakakora; Iyo yakakwirira iyo refractive index, iyo yakaonda iyo lens