Double vision due to paralysis of the ocular muscles; seen in inhalant intoxication and other conditions affecting the oculomotor nerve.
The perception of two images from a single object.
A condition in which someone sees single objects as double.
The condition in which a single object is perceived as two objects; double vision.
Diplopia, also known as double vision, is a vision impairment in which the eye sees two images. There are two types of diplopia, monocular and binocular. In monocular, the double vision is present at all times, even when one eye is occluded or closed. Monocular diplopia is caused by defects to the front of the eye, such as. cataracts or a need for glasses. In binocular, it is due to the misalignment of the images that are reflected to the brain. For example, one eye may aim higher or lower than the other so that they cannot fuse into one image. This problem can be remedied by closing one eye or occluding it. Binocular diplopia often occurs secondary to other disorders.
Double vision, in which a single object is seen as two objects. If one eye is covered, diplopia often disappears.
Visual disturbance where single objects are perceived as two objects; caused by increased intracranial pressure or by multiple sclerosis that affects nerve conduction.
The simultaneous awareness of two images of the one object. It is usually due to a disturbance in the coordinated movements of the muscles that move the eyeball, and covering one eye will abolish it. A very slight degree of doubling, which does not disappear when one eye is covered, may be experienced by introspective people. This is uniocular diplopia, and only in the rarest cases is there any abnormality of the eye.
Double vision. It is due to some irregularity in action of the muscles which move the eyeballs, in consequence of which the eyes are placed so that rays of light from one object do not fall upon corresponding parts of the two retinae, and two images are produced. It is a symptom of several nervous diseases, and often a temporary attack follows an injury to the eye, intoxication, or some febrile disease like diphtheria.
Double vision, or the simultaneous awareness of two images of the same object that results from a failure of the two eyes to work in a coordinated fashion. Covering one eye will erase one of the images.