A parabolic, spherical, or other standard conic curvature is provided on the convex surface, which has {TAIL ~ a mirrored coating} applied, and the concave surface has an aspheric curvature and {HEAD ~ an anti reflective coating}, which functions as a corrective lens to reduce spherical aberration and other naturally occurring optical aberrations 
A parabolic , spherical , or other standard conic curvature is provided on the convex surface , which has { TAIL ~ a mirrored coating } applied , and the concave surface has an aspheric curvature and { HEAD ~ an anti reflective coating } , which functions as a corrective lens to reduce spherical aberration and other naturally occurring optical aberrations
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