3D printed pinhole projector shields bright eyes during total eclipse of the sun

Many people across North America will be able to witness a solar eclipse on Monday, and 3D printed pinhole projectors are a cheap, safe way to view the phenomenon without damaging your eyes. On Monday, August 21, the “Great American Total Solar Eclipse” will block out the sun all the way from Oregon to South Carolina, throwing darkness on a stretch of land 70 miles wide.

from 3ders.org - http://www.3ders.org