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The Hollow-Face illusion (also known as Hollow-Mask illusion) is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face. While a convex face will appear to look in a single direction, and the gaze of a flat face, such as the Lord Kitchener Wants You poster, can appear to track a moving viewer, a ...
The front of a horse's face when viewed from the side will usually be straight from the forehead to the nostrils. A Roman nose is a facial profile that is convex, and is often associated with draft horses. A dished face is a concave profile with a dip in the face between the eyes and nostrils, usually associated with Arabians.
An "aquiline" nasal profile From parody nose classification Notes on Noses: "It indicates great decision, considerable Energy, Firmness, Absence of Refinement, and disregard for the bienseances of life". [1] An aquiline nose (also called a Roman nose) is a human nose with a prominent bridge, giving it the appearance of being curved or slightly ...
Other varieties of concave moulding are the scotia and congé and other convex mouldings the echinus, the torus and the astragal. Placing an ovolo directly above a cavetto forms a smooth s-shaped curve with vertical ends that is called an ogee or cyma reversa moulding. Its shadow appears as a band light at the top and bottom but dark in the ...
A concave mirror, or converging mirror, has a reflecting surface that is recessed inward (away from the incident light). Concave mirrors reflect light inward to one focal point. They are used to focus light. Unlike convex mirrors, concave mirrors show different image types depending on the distance between the object and the mirror.
A building's surface detailing, inside and outside, often includes decorative moulding, and these often contain ogee-shaped profiles—consisting (from low to high) of a concave arc flowing into a convex arc, with vertical ends; if the lower curve is convex and higher one concave, this is known as a Roman ogee, although frequently the terms are used interchangeably and for a variety of other ...
"You could see a diamond-shaped face, and someone else would call it an oblong face," says Dr. Tripathi. "There's a more gaunt temple area, more width to the mid-face, and then a narrower lower face."
The outer surface is concavo-convex from above downward, convex from side to side; it is covered by the procerus and nasalis muscles, and perforated about its center by the nasal foramen, a small passageway for the transmission of a small vein from the overlying soft tissues.