Diplopia

Introduction Under the premise of the normal retina, an object falls on a non-corresponding point of the retina that is too large to separate, and cannot form a binocular monocular, but an object as two. As long as there is one or several inflammations, traumas or neurological disorders in the six muscles that control the rotation of the eyeball, the muscles of the eyes are not coordinated, such as the right lateral rectus muscle contracting, while the left internal rectus muscle contraction is slower or the contraction force is insufficient, the eyeball The rotation will be limited, or the eyeball will be biased to one side, forming a squint. At this time, it will be particularly difficult to see things, or an object can be seen as two, resulting in double vision of the object, that is, double vision.

Cause

Causes

There are many reasons for diplopia, which is mainly caused by weakness or paralysis of the outer eye muscles of the eyes, while the outer eye muscles are controlled by the cranial nerves, so the diseases of the cranial nerves or the brain itself may cause diplopia.

Pathogenesis

The principle of diplopia is that the image of one eye falls on the concave of the macula, while the image of the other eye does not fall on the concave. The image that falls on the concave is always clearer than the image that does not fall on the fovea, thus forming two images.

an examination

Related inspection

Ophthalmologic examination, eye function examination, eye movement examination, fundus examination, single vision examination

1. Ophthalmic examination: eye function examination, fundus examination, eye function examination and vision examination.

2. Examination of the optic nerve and eye muscles.

Differential diagnosis

Differential diagnosis:

1. Strabismus amblyopia is caused by diplopia and confusion caused by strabismus, which makes the patient feel uncomfortable. The visual center actively suppresses the visual impulse of the macula from the strabismus. The amblyopia caused by the long-term inhibition of the macula is called strabismic amblyopia.

2, fog vision is blurred, is the early symptoms of angle-closure glaucoma, it is a common type of glaucoma in China.

3. When a person is looking at the light, if there is a color halo around the light, it is medically called 'Hongvision.' The so-called color halo, that is, a colored halo, etc. Rainbow vision appears in front of the eye, which is due to the eyeball The change of diopter produces a spectroscopic effect, and the white light emitted from the front is decomposed into a plurality of color components according to the wavelengths of various light contained therein, so that a typical colored halo appears. Rainbow vision is an eye disease. A more common symptom.

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