sight

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sight:

see visionvision,
physiological sense of sight by which the form, color, size, movements, and distance of objects are perceived. Vision in Humans

The human eye functions somewhat like a camera; that is, it receives and focuses light upon a photosensitive receiver, the retina.
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.

sight

[sīt]
(navigation)
(ordnance)
Mechanical or optical device for aiming a firearm or for laying a gun or launcher in position.
To aim at a target or aiming point.
(physiology)

sight

i. An optical device for the measurement of drift. See drift indicator.
ii. An aiming device for aiming weapons. It may be a part of a head-up display or a separate unit. It may be fixed, gyro, or electronic. See sight glass (iii).
iii. To make an observation of a heavenly body with a sextant.

sight

1. the power or faculty of seeing; perception by the eyes; vision
2. any of various devices or instruments used to assist the eye in making alignments or directional observations, esp such a device used in aiming a gun
3. an observation or alignment made with such a device
References in periodicals archive ?
Alpec Team's Accurizer is a new chamberable laser bore sighter for rifles, shotguns and semi-automatic pistols.
That proved to be a good sighter for Del Piero as the Juventus striker conjured up another piece of free-kick artistry to put Italy 2-0 up after 64 minutes.
But then the champion sprang to life as he made his first attempt at a maximum 147 break,but a sighter it worked wonders, for the world No 2 looked a different player after the break.
He is turning into a classy and tough staying hurdler, the ideal type needed to conquer the Albert Bartlett, and trainer Charles Byrnes has already brought him over for a sighter at Cheltenham, where he was just touched off at the October meeting.
In all probability O'Brien will have bigger guns to fire at the premier Classic in June, but this 10-furlong conditions event will give him a sighter.
Most judges concluded, however, that Never Perfect would be considerably better off with that sighter in the bag as he was not given an overly robust ride.
With that pleasing sighter in the bag, this seven-furlong test should propel Elle Est into the winner's enclosure at the second time of asking.
Luke Beckett had an early sighter for the home side, before Danny Cullip headed over the bar from a Nicky Southall free-kick.
Now I have no choice but to use the sighter target and shoot in the new wind condition.
They paid for it by conceding two free kicks just outside the box, the first providing a sighter for Beckham and the second a chance to prove he hasn't lost the knack of curling in free kicks.
Therefore it was interesting he gave Our Vinnie an early sighter of Cheltenham last month, a race in which he might have beaten According To Trev but for a sloppy leap at the last.
The Marju filly - out of a halfsister to Soviet Song - was denied by a head on her debut at Windsor and, with that sighter in the bag, is open to any amount of experience.