EYEPIECE n.
ghenian, eyepiece, an eyepiece consisting of two plano-convex lenses with their curved surfaces turned toward the object glass, and separated from each other by about half the sum of their focal distances, the image viewed by the eye being formed between the two lenses. it was devised by Huyghens, who applied it to the…
FACIAL a.
Of or pertaining to the face; as, the facial artery, vein, or nerve. -- Fa"cial*ly, adv. Facial angle (Anat.), the angle, in a skull, included between a straight line (ab, in the illustrations), from the most prominent part of the forehead to the front efge of the upper jaw bone, and another (cd) from this point to th…