Scotoma can be indicative of several diseases related to eye function, including retinal detachment, glaucoma, cataracts, macular disorders, and optic nerve changes. Other times, this symptom results from some forms of migraine, intoxication (or poisoning). ), ischemia, lesions or brain tumors More rarely, scotomas are due to side effects of some drugs.
The visual field gap (i.e. the blind zone) can be of various sizes and shapes. The scotoma has a rather variable frequency, while the duration of the manifestation is correlated to the pathological event.
.Those who experience a scotoma perceive a spot, a blurry area or small luminous traces of different colors (yellow, red, blue, green, black, etc.) in the center of the visual field or around it. The scotoma can be physiological or pathological; in the latter case, it is generally caused by lesions of the retina, of the optic pathways and of the cortical visual centers, but it can also depend on other situations. The result is in any case a zone of reduced or absent response to the light stimulus in the visual field.
