Pincushions are typically filled tightly, so as to hold pins rigidly once placed.
The distinctive appearance of a pin-filled pincushion has resulted in the term being used for a variety of other things including several varieties of plants, and a type of sea star. In addition, the form of the cushion itself has lended its name to the phenomenon of pincushion distortion in optics and video displays.
US Patent Issued to Young Optics on Jan. 18 for "Optical Projection System Utilizing an Aspherical Lens for Producing a Pincushion Distortion of the Image and a Reflector for Compensating the Same" (Taiwanese Inventors)
Jan 24, 2011; ALEXANDRIA, Va., Jan. 24 -- United States Patent no. 7,871,166, issued on Jan. 18, was assigned to Young Optics Inc. (Hsin-Chu,...