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The existence of the pin-hole pupil is also a contraindication to its employment.
A Pin-hole Camera is another extremely simple yet extraordinarily interesting contrivance (Fig. 100).Toy-Making at Home|Morley Adams
This is best done through a filter perforated at its apex by a pin-hole.
With the right eye look through the pin-hole, the left eye being closed.
The pin-hole camera is simply a light-tight box with a small aperture in one side.Physics|Willis Eugene Tower