Hemianopia Quadrantanopia

Hemianopic hemianopsia, otherwise called Hemianopsia, refers to a vision disorder that affects one part of the eye. This condition is characterized by loss of the field of vision on one side of this organ. This occurs due to injury to the visual apparatus or certain diseases. Often the patient cannot even talk about the existing defect, and most of the disease is accompanied by blindness of one eye. In medicine, it is also common to divide hemianesthesia of this type into four types: Upper ocular or posterior, Superficial, deep and lower. Of the listed types, two types of manifestation of the disease are distinguished - Upper ocular and Deep - they occur most often and are described in the literature on ophthalmology as the first pair. The remaining types are usually not found in the presence of visual system disorders. This is due to the fact that the parts of the eye anatomy affected by these types are located nearby and have the same structure. The first form proceeds like this - the field of vision of the affected half is sharply reduced - to 1-2 degrees. Thus, the patient sees an almost completely “healthy” eye, while the healthy one turns out to be completely incapacitated. Loss of vision is characterized by the disappearance of any defined boundaries. The area of ​​visual impairment has the shape of an ellipse. As for the second type, the field of view during its manifestation narrows down to points. In this case, the inability of the eyes to clearly see the boundary remains and the patient can examine the damaged eye. As for the healthy one, it is completely useless. Square hemianopia is characterized by damage to various parts of the eyeball, as a rule, this is only the first or second degree of distortion of the peripheral gaze, and maybe several options at once, but in a combination of no more than two symptoms from a more rarefied type.