Monocular vision

Under Monokularsehen or monocular vision (Greek mono for one, and oculus for eye), also: monovision, means the permanent or temporary vision with only one eye due to functional or organic condition of monocular vision. This also includes the alternate ( alternating ) using two eyes independently and without functional interconnection. In contrast, the binocular vision is a skill that the simultaneous viewing with both eyes on the basis of a neural system of relationships, the retinal correspondence allowed. Only a trained normal binocular vision enables a real, three-dimensional stereoscopic vision. But while seeing with one eye, the brain can give the impression of spaciousness, which is why it is also called the binocular vision of psychological and physiological depth perception when Monokularsehen.

Causes of Monokularsehens

The causes that lead to Monokularsehen are different. Living organisms ( eg, humans ) that are potentially capable of binocular vision, this can prevent about by the closing of an eye or wearing an eye patch temporarily. A permanent Monokularsehen can result from injuries and illnesses (eg, anophthalmia, high anisometropia ). However, the most common cause of the pathological lack of binocular vision and thus a monovision are strabismus.

With a new refractive surgical aid for the treatment of presbyopia, the so-called KAMRA implant, an artificial monovision is generated which, although improved visual acuity in the central vicinity, but leads to a loss of spatial vision. Many prey animals an " alternating " Monokularsehen with great all-round visibility to detect hunters, as well as birds and lizards.

Monocular depth perception

There are a number of cues or depth criteria, which also sell under monovision the impression of stereoscopic vision. This depth stimuli according to whether they are dependent on the motion of the observer or the objects. This is called either pictorial or image-related or movement- induced deep stimuli.

• Motion parallax

Effect, the optical results when different objects are distributed differently from each other in a landscape, the observer moves laterally parallel to these objects while looking towards the horizon.

• Atmospheric perspective

The Earth seen from the Moon. Since the moon has virtually no atmosphere, the image of the Earth is " razor sharp ".

Atmospheric perspective refers to the influence that the specific atmosphere ( their composition ) has on the perceived appearance of an observed object from a distance. For example, decreases the contrast between object and background.

• Occlusion, overlap, interposition or occlusion

Concealment describes the fact that objects hide the objects are further forward beyond.

• Perspective convergence

• Texture gradient

The structure of a surface is interpreted as depth when the items up the tree are getting smaller and thus also are dense (more elements per unit area).

• Relative size

If one and the same object is located farther away from the observer, it seems to him less. However, arise one and the same retinal image with different sized objects that are sufficiently far apart. If you have any information about the distance to objects of different size objects can produce identical power house images.

Other cues are:

• Relative height
• Familiar size
• Shadow