Decreased or absent eye accommodation

Introduction Like the brain, the eyeball is an organ rich in nerves and blood vessels, and it carries extremely complex physiological functions. In order to see the close range of the target, the intraocular lens-ciliary muscle contraction increases the curvature of the intraocular lens, thereby enhancing the refractive power of the eye, so that close objects can form a clear image on the retina. The adjustment function of the functional eye that changes the refractive power of the eye by seeing the near object. Decreased or disappeared eyeball function will reduce vision. The reason why the eye can see the object is because the transparent interstitial of the cornea, aqueous humor, lens and vitreous of the eyeball images the external light to the retina.

Cause

Causes of decreased or disappeared eyeball regulation:

The reason why the eye can see the object is because the transparent interstitial of the cornea, aqueous humor, lens and vitreous of the eyeball images the external light to the retina. The retina can sense the stimulation of light because it contains two kinds of photoreceptor cells, namely cone cells and rod cells. Under the action of light, a series of chemical changes occur inside the photoreceptor cells, and these chemical changes can transform the light energy. For electrical energy, it causes nerve impulses to be transmitted to the visual center to produce vision. The eyeball adjustment function is reduced due to various factors such as loss or disappearance.

an examination

Related inspection

Ultrasound examination of the eyeball and eyelids

Examination and diagnosis of eyeball dysfunction or disappearance:

1. Intraocular pressure.

2. Ophthalmoscopy: Fundus examination should be performed in the dark room. The patient takes a seat and the doctor can take a seat or stand. The right hand held ophthalmoscope is located on the right side of the patient.

3. Ultrasound examination of the eyelids.

Differential diagnosis

The following checks can be done to diagnose:

1. Intraocular pressure.

2. Ophthalmoscopy: Fundus examination should be performed in the dark room. The patient takes a seat and the doctor can take a seat or stand. The right hand held ophthalmoscope is located on the right side of the patient.

3. Ultrasound examination of the eyelids.

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