I have a pair of Bushnell 20x50 Powerview getting double vision. Can focus each side by themsleves but not together.

They are $42 plus post on eBay
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Try this website to get a return form:
http://www.bushnell.com/global/customer-service/global-customer-service-product-repairs

Bushnell Outdoor Products, ATTN: Lab Repair, 9200 Cody, Overland Park, KS, 66214

The nightvision works only in dark when theres no light otherwise the screen will go clearwhite because overlighting

Hello - I never had Plastimo before but I have had a similar problem with double vision on a very similar looking pair of binoculars.
The eye piece movement just re-aligns eye focus differences , a double image usually means one of the lenses has moved inside the main tube. (usually from a knock/fall etc)
Can you rotate either one of the tubes ? On my pair I had to rotate anti-clockwide and found a prism inside that had slipped after a fall -
Close one eye and try to gauge which side is the best side -- Ray

The optics have shifted. Either the front objective housing have been knocked sideways in the body thread, or the intermal prisms have moved. If they are new binoculars take them back to the place of purchase and ask if they can repair them or know of a repair agent.

Try grabbing the binoculars in both hands and twisting the body in the opposite direction of the double vision until the images coincide.

I had the same model, same problem. Bushnell replaced mine under warranty, If they needed to send it for repair it had to go to Russia. I guess it was cheaper to give me a new one. If its not under warranty Bushnell will send it off for you but it will cost quite a bit. My new pair lasted about 2 years with a lot of usage. Gen 1 night vision tubes do not have a very long life span. You may be better served buying a new pair of night vision binos.

insta-vision bino's are self focusing no adjustments.

Hi - This called the diopter adjustment which compensates for small differences in focus between the left & right eyes.

See the following web page for adjusting :

http://www.birdwatching.com/optics/diopter_set.html

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Informatica

The distance between the centers of the eyepieces of your binocular must be the same as the distance between your pupils. This distance is adjusted as follows: 1. Focus on a distant object. 2. Pivot the two halves of your binocular farther or closer apart until you can see a single unobstructed, circular field of view. Make sure to focus on a distant object when you do this because when you focus on a close object you always see two slightly overlapping circular fields. Your binocular may have a scale on the top, between the eyepieces, to help you remember this setting.