Can't tell the difference between red and green

Introduction The symptoms of alcoholic amblyopia are often the central dark spots in the visual field of both eyes, mostly symmetry, and the dark spots of reddish green and white visual field are more significant. The peripheral field of view is usually not affected, and the patient is unclear about the red-green color. The disease is related to long-term drinking, and the pathogenesis is not fully understood. It has been reported that it is mainly caused by lack of nutrition, especially the lack of B vitamins. It is also associated with direct toxic effects of alcohol that cause optic nerve damage. Pathological changes showed that the bilateral symmetry optic nerve fibers were lost in the myelin sheath, the retinal ganglion cells disappeared, and the macular area was the most important. In severe cases, the optic nerve fibers could be replaced by collagen connective tissue.

Cause

(1) Causes of the disease

The cause of alcoholic amblyopia is associated with one or more B vitamin deficiency, and there are also alcohol toxic factors leading to optic neuropathy.

(two) pathogenesis

The disease is related to long-term drinking, and the pathogenesis is not fully understood. It has been reported that it is mainly caused by lack of nutrition, especially the lack of B vitamins. It is also associated with direct toxic effects of alcohol that cause optic nerve damage. Pathological changes showed that the bilateral symmetry optic nerve fibers were lost in the myelin sheath, the retinal ganglion cells disappeared, and the macular area was the most important. In severe cases, the optic nerve fibers could be replaced by collagen connective tissue.

an examination

Related inspection

Ophthalmologic examination, brain CT examination, EEG examination

1. Determination of blood and urine alcohol concentration: There is a diagnosis and the significance of the degree of alcoholism.

2, other blood tests: including blood biochemistry, liver function, kidney function, coagulation function and immunoglobulin.

3, ECG, EEG, brain CT or MRI examination, there is a differential diagnosis and the significance of the degree of poisoning assessment.

4. Selective electromyography and neurophysiological examination have differential diagnosis significance.

Differential diagnosis

Differential diagnosis of red and green colors:

1, red blind: also known as the first color blindness. The patient is mainly unable to distinguish red, and cannot distinguish between red and dark green, blue and purple, and purple. Often, green is considered yellow, purple is seen as blue, and green and blue are mixed into white.

2, yellow vision: yellow vision refers to the visual yellowing, accompanied by blindness (lower visual acuity in the context of increased illumination), blurred vision, reduced color vision and side dark spots.

3, blue and yellow blind: blue and yellow blind, also known as the third color blind. The patient's blue-yellow color is unclear and is identifiable to red and green. People with blue-yellow color blindness are difficult to recognize blue and yellow. Blue-yellow blindness includes blue blind (tritanopia, third color blindness) and blue weak (tritanomaly, third color weak). Blue-yellow blindness is one of color blindness.

4, green blind: green blind, also known as the second color blind, patients can not distinguish between light green and deep red, purple and blue, purple and gray, green as gray or dark black.

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