Skjold Front Surface Mirrors Skjold front surface mirrors feature rhodium coating which produces a clear, distortion free image. Features > The rhodium coated reflective front surface provides a bright, sharp and distortion free image > Simple stem thread for ease of fitting mirror head to mirror handle > Autoclavable The difference between Plane Surface and Front Surface mirrors A plane, or rear surface mirror, features the reflective surface at the rear of the mirror surface so light must pass through the glass to strike the reflective coating before reflecting through the glass which produces a slightly distorted secondary reflection. A front surface mirror has its reflecting surface at the top, or surface, of the glass. This leads to a single reflection resulting in an exact sharp image, eliminating light refraction and ghosting, which is inevitable in plane surface mirrors.