Awen eqqal iddikud n iddikud n iddikud n lenses
Context:Edey n lens tan raqqosnen  Ijjit n lens tan aqqalan lenses spherical: issin ihandagan nasan aqqalan ichrutan n ihandagan n sfer tan Edag fuk addobat ad eqqil convex (illan s ajjama daɣ lens), concave (illan daɣ lens) meɣ planar (flat) Izirwan wi ahanen ammas n ihandagan wi eɣnanen arori n lens isim net axis wan lens Alwaq wa id axis n lens itiki s ammas n lens fal immik wa s ijjan Lens tan addoben a tan ijjan meɣ a tan ijjan darat amukin i ad ikrichan dumu meɣ iddikud izlayan Axis wan lens addobat alwaq wen a war itiki s ammas n lens  Lens tan toric meɣ spheric-cylindrical ilan arori ilan radius tan n curvature izlaynen daɣ issin iɣalayan n orthogonal Ilan tan assahat izlaynen daɣ meridians izlaynen Awen eqqal astigmatic lens Almital eqqal lenses n alkas wi axdamnen i amukin n astigmatism daɣ tišijrit n awadim
Dumu tan izlaynen n lens tan aqqalan: - Convex: tijililwăyen daɣ ammas n lens - Concave: curves daɣ ammas n lens - Planar: lens ijjanen