Cheap Night Vision Goggles

Do you suffer from diminished night vision? It is not uncommon to have fantastic vision during daylight hours only to be reduced to squinting once the sun goes down.

Fortunately for you, there are a couple of things you have hegemony over to boost your night vision.

As you doubtless know, your pupil is the gap that controls how much light reaches your retina. in bright light situation you pupil constricts and becomes small. The visual effect is less peripheral blur, and sharper focus directly ahead. In dark light your pupil opens wider, allowing more peripheral image in. That will inherently cause more blur all by itself. The natural way we combat that is by squinting, it is an attempt to use our lids as a secondary light gap.

But night vision goes far beyond pupil size and light apertures. The part of the eye that receives and interprets the image is most vital. That is the retina, and in dim light, the rods on the retina perceive black and white images and work best in low light (ie. night vision).

Your retinal rods rely on a compound known as rhodopsin, which absorbs photons and perceives light. The retinal rhodopsin in the human eye is derived from vitamin A. So in turn, if your diet is low in Vitamin A, there is a excellent chance your night vision is being compromised.

Start eating more fruits and vegetables that are yellow and orange in color as they are fantastic sources of vitamin A. So bugs bunny was right, eat more carrots.

A further source of blurred night vision may be your contact lenses. If you wear lenses with a small optic zone, they might be inducing peripheral blur. For most eyes, the best type of contact lens at night is one with front aspheric optics. This means there is gradual fall of power as the optics taper towards the edge. For most, this means the peripheral image will be more in focus. This is not right 100% of the time, but it works for many.

As you can see, night and day vision can be perceived very differently. So start eating you yellow and orange fruits or vegetables. And if you reckon your contact lenses are to blame, question your eye care source about front aspheric optics.

Author: Barbara Lewis
Article Source: EzineArticles.com
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