blurred vision
Introduction
Introduction Visual blur refers to obscuring things, and there are many reasons for blurring the vision. It can be a variety of eye diseases, or it can be refractive errors, such as myopia, hyperopia, astigmatism, etc. It may also be a complication caused by other systemic diseases. Or it is caused by outside interference if it is not a disease.
Cause
Cause
1, refractive error myopia: see near and clear, can not see distant objects.
2, hyperopia: mild hyperopia will appear far and clear, seeing is not clear, the higher degree of farsightedness is far from clear.
3, astigmatism: very slight astigmatism, such as below 50 degrees, generally does not cause blurred vision, but astigmatism above 75 degrees, generally appear to look far and near is not clear, there are ghosting, line clarity in different directions is inconsistent Night vision or dark vision is worse. There are often blinking habits and torticollis, which can easily cause visual fatigue. Long-term reading can easily cause headaches.
4, presbyopia refers to the appearance of close reading and visual difficulties, the difference between presbyopia and several other refractive errors is that it is related to the adjustment of age and own eyes, presbyopia can appear around 40 years old, almost Everyone will happen.
5, a serious role of vitamin A deficiency vitamin A is to maintain normal vision and prevent night blindness. The photoreceptor on the retina, rhodopsin, is a binding protein. Rhodopsin is a combination of vitamin A and opsin, and is present in rod cells. Retinal cells are composed of cone cells and rod cells. Cone cells are dedicated to seeing things during the day, that is, clear vision. The rod cells are dedicated to seeing things at night, that is, squinting. If vitamin A is deficient, it will affect the synthesis and renewal of rhodopsin, and night blindness will occur, which will weaken the dark vision of the eye.
6, other diseases caused by lesions
Such as cardiovascular and cerebrovascular diseases, neuropathy, chronic disease complications.
Examine
an examination
Related inspection
Fundus examination
Traditional Chinese medicine thinks that it is more common: liver and kidney yin deficiency, more common in long-term consumption and yin, that is, liver blood is slowly being dissipated by you, often dizziness, inattention, like sleeping, fatigue, sight fatigue, etc. Chronic symptoms.
Diagnosis
Differential diagnosis
Can be distinguished from visual distortion.
The deformation of the object is caused by the lesion of the retina or the macula, which causes the image of the object to be distorted and changed.
