pin cushion

1. Sewing. A device for storing pins and sharp needles. For some explicable reason (solely whimsical?), almost always resembles a tomato:
View attachment 5145
and often includes a strawberry, which is filled with an abrasive that sharpens when the pin is inserted and removed.

2. Optics. A type of optical distortion prevalent with wide-angle lenses, where straight lines appear to curve inward.
View attachment 5146
Evidenced particularly in 70° and 90° ERS units, where the shutter cuts do not appear straight.

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