Dose myopia cause double vision?
Double vision is divided into physiological double vision and pathological double vision. There are many reasons for it. Generally, myopia will not lead to double vision.
Other causes of double vision.
Multiple neuritis patients involving the innervation of the ocular muscles, severe muscle inaction, ocular burns, traumatic scars, orbital tumor compression, severe symblepharon and so on can affect eye movement and cause double vision.
Diplopia caused by binocular fusion disorder is caused by the difference of the clarity or size of the binocular image exceeds the ability of the brain to fuse the image.
It can be seen that the visual acuity of the lesion center of one eye is low, the clear image of the macula of the healthy eye and the blurred image of the macula of the affected eye cannot be fused in the brain, resulting in double vision.
High anisometropia and one eye after phacoemulsification may cause double vision due to the difference of image size between the two retinas exceeding the limit of brain fusion ability.
In strabismus patients with abnormal retinal correspondence after strabismus correction surgery, double vision may occur because the abnormal retinal correspondence still exists in the brain and cannot adapt to the normal retinal correspondence.
Because the position of the virtual image in this diplopia is opposite to the normal position of the virtual image of the original strabismus, that is, the cross double vision appears in the original esotropia, and the ipsilateral diplopia appears in the original exotropia, so it is called contradictory double vision.
In addition, binocular diplopia may occur after traumatic cerebral concussion, poisoning and excessive fatigue. Diplopia can also be caused by the discrepancy between the lens optical center and pupil distance in ametropia patients.
Monocular double vision is most common in some lesions of the eyeball itself. Such as keratitis caused by central thickening or deformation, irregular corneal astigmatism, large eyelid cyst or tumor compression of the eyeball, etc., can produce monocular diplopia due to corneal irregular refraction.
The abnormal refraction of external light in the eyeball may result in monocular diplopia due to iridodialysis, dislocation or subluxation of lens, bubbles or transparent foreign bodies in the refractive stroma of the eyeball.
In addition, monocular double vision can also be seen with local or systemic diseases caused by macular edema, some central nervous diseases, hysteria patients and so on.
In conclusion, double vision can be divided into binocular double vision and monocular double vision. Binocular diplopia is mainly seen in patients with paralytic strabismus, and the location diagnosis of paralytic ophthalmic muscles can be made according to the position of virtual image in double vision.
Monocular double vision is often caused by irregular refraction of light caused by ocular diseases. Other local or systemic diseases are also associated with double vision.