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B

B

Base, stereo
Is the gap between the left and right lenses when taking a stereoscopic photograph. A regular stereo base is thought to be one similar to the distance between your left and right eye (65mm).

Base height ratio
The recommended base height ratio is 1:6. This term is used for stereo images and it refers to the ratio between the base distance and the camera distance.

Baseline
Baseline simply refers to the distance you move between the left and right pictures when you are taking them.

Beamsplitter
This device consists of prisms or/and mirrors that can simply be attached to a mono camera, and the effect produces two parallel images within a single frame. It is also more accurately known as an ‘Image-Splitter’, due to the fact that it does not actually split an individual beam into components. The rays of light which form the left and right images as they enter the cameras lens and cross over, means that the recorded images end up in the correct configuration for stereo viewing.

Binocular
Is simply the definition for the use of both eyes at once.

Binocular depth perception
B.D.P is the result of successful stereo vision. Successful stereo vision requires the ability to visually perceive 3D space; whilst at same time being able to judge distances between objects.

Binocular skills
A binocular skill is a term used to cover a wide range of skills that are required when using both eyes together to take in an image. This includes the efficient use of the eyes to see in a three dimensional space (stereoscopic vision). Binocular skills do however come with some difficulty, for example; focusing, eye movement accuracy, eye alignment, all these factors can reduce the speed of processing information.

Binocular viewer
This device is a simple two-lensed piece of equipment for viewing pictures where using both eyes gives an easier viewing experience and enhances the impression of depth.

Binocular vision
Refers to both eyes working together smoothly and simultaneously.

Binocular vision disability
Is a visual defect in which both eyes cease to work together which results in a partial or even a total loss of stereoscopic vision and binocular depth perception. It is said that around 12% of the population has some form of binocular vision disability. The most commonly known forms of binocular vision disabilities are Amblyopia and strabismus.

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