types and classification of simple lenses

arched biconcave biconvex blue bundled classification classified collecting concave contact convex cross curvature cutout diopters dispersal eyeglasses focus glass goggles lens lenses light look meniscus optical optically optics optional physics plano plastic ray refraction refractive schematic section sharpness simple specs spectacles spherical surface surfacesn symmetrical symmetry transparent types vault vector vitreous watch