But anyone with a pair of field glasses can see for himself what Baptistina's daughters are capable of.

ECONOMIST: Asteroid impacts

Five days of trading the field glasses and taking turns crawling back into the trees to smoke out of sight.

NEWYORKER: The Tree Line, Kansas, 1934

The days of field glasses and butterfly nets may thus be numbered.

ECONOMIST: A 30-year plan to study America��s ecology is about to begin

Barnes raised the field glasses up, lowered them, pursed his lips as if in deep thought, and then said, in a newly formed sarcastic voice, Hell, you missed the whole thing, Lee.

NEWYORKER: The Tree Line, Kansas, 1934

Scheidies says he doesn't buy the argument that the blackout glasses ''level the playing field'' between runners who have some sight and those who have none.

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Eye tracking is accomplished by two small cameras on the rim of the glasses while a scene camera records the field of view of the user.

ENGADGET: SMI Eye-Tracking 3D Glasses use rim-based cameras to adjust perspective