How to use both eyes alternately?

summary

Alternate vision: the lens is designed to move with the gaze direction on the cornea, so that the far and near areas can almost completely cover the pupil. Long distance or close distance vision can make the line of sight alternate through different areas of the pupil. Alternate vision occurs in patients with good binocular vision. Both eyes can focus on the target and can use two eyes alternately. Another case is that one eye is short-sighted and the other eye is emmetropia or mild hyperopia. They will unconsciously use myopia when looking near and emmetropia or hyperopia when looking far, which forms the rule of using both eyes instead. Although they only use one eye at a time, because they look far away, they can't use both eyes, There is no use of accommodation and convergence during the approach, so there may be no symptoms. So how does alternating use of both eyes cause it?

How to use both eyes alternately?

Developmental factors: in the process of eye development, the degree of hyperopia is decreasing, while the degree of myopia is developing. If the development progress of the two eyes is different, it may cause anisometropia; Abnormal binocular visual function: anisometropia often occurs after strabismus, mainly because strabismus affects or destroys the process of emmetropia, interrupting the development of binocular visual function.

According to its etiology, it can be classified as follows: hereditary, including congenital glaucoma, congenital cataract and some diseases leading to eyelid closure, such as congenital oculomotor nerve palsy, ptosis, etc; Acquired, including traumatic, intrabulbar or peribulbar space occupying lesions and iatrogenic factors, such as aphakia after monocular lens extraction, refractive surgery, penetrating keratoplasty, etc.

The incidence rate of anisometropia is also 55%, and other diseases such as eyelid hemangioma, retinopathy (vitreous body blood), nuclear cataract, etc. ④ Surgical factors: some surgeries can cause adult anisometropia, such as intraocular lens implantation, corneal transplantation, rk, etc.

matters needing attention

Strabismus and amblyopia may not be accompanied by strabismus, but if the visual function of the eye is suppressed for a long time and abandoned, strabismus is easy to occur. When using the computer, in addition to proper rest and activities, it is necessary to strengthen the protection of the eyes, and properly supplement vitamin A and protein. Usually can drink more tea, tea contains tea polyphenols and other active substances, is conducive to the absorption and resistance of radioactive substances.