Double vision. 7x35 ewa Field 11 Legacy - Bausch and Lomb Legacy 12-1056 Binocular

Optical field of view (FOV) refers to the width of the area that you can see when looking through a pair of Binoculars or a Spotting Scope, quite simply, how wide an area you can see through your optics. Field of view is usually described in terms of 'linear field of view' or 'angular field of view'. Both figures essentially indicate that the field of view of the optic is a certain width, but they just use different numbers to describe this.

Linear field of view is also known as the true field of view and indicates the width (in m) of the area that you can see when standing 1,000m away from an object.
Angular field of view is also known as the apparent field of view and refers to the true angle (in degrees) seen through the optics.
It is easy to convert between the two field of vision measurements:
To convert an angular field of vision to a linear field of vision, simply multiply the angular field of vision by 52.5.
To convert a linear field of vision to an angular field of vision, simply divide the liner field of vision by 52.5.

When choosing your binoculars or spotting scope, take some time to consider where you are planning to use them, as this will indicate the most suitable field of view required to get the most out of your product. The most important thing to remember is that the larger the number is given to the field of view (FOV), the larger the width of the area you will be able to see through your scope. A larger field of view is desirable if you are planning to use your scope to watch anything that is moving quickly across your viewing area as it will make it easier to aim and stay on a moving subject. For this reason, scopes with a larger field of view are favored by people watching birds in flight, a ball at a cricket game, an athlete in a race or views from a moving car.
Don't forget field of view (FOV) and magnification are closely linked, with higher magnifications resulting in a smaller field of view. Take some time to consider whether you wish to view your subject in great detail, or would prefer to be able to keep track of it if it is moving quickly; after all, there's no point being able to see the fine detail on a bird's feather if you can't find the bird in the first place!

hi Janet.
Can a mini stroke affect your eyes? Sight problems are more common when you suffer a stroke affecting the right side of your brain. The damage caused by a stroke in your brain impacts the visual pathways of your eye which can result in visual field loss including central vision blurry vision, double vision and processing of visual information.
go to this link and read up some more.

Does eyesight go during mini stroke Google Search

They are $42 plus post on eBay
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It sounds like they are out of alignment. You'll need to contact Nikon for service.
Their contact number is 1-800-645-6687.
Best Regards,
Ben Lizdas
Sales Manager
Eagle Optics
1-800-289-112

Over time the grease in the central pivot shaft hardens to restric the rotation of the focusing wheel. Heat from a hair dryer combined with a little WD-40 can ustally re-soften the grease permitting the wheel to turn slightly. Working the wheel back and forth over a short period of time should get it to work again easily.

The prisms have shifted inside of the binoculars. This is not an easy job as you have to make corrections to the angle of the prisms for leaning field and collimation. Two suggestions:
1. If they are under warranty take them to a repair agent.
2. If you want to do it yourself, there are instructions on the web about how to go about effecting a collimation. Too long to go into detail here.

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

convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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.

need colimation