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Visual cortex examination

Evaluation of the visual cortex

 Our visual system is composed of integrated and highly ordered neural and muscular networks and is continuously connected to the brain. Any disruption of this network has a negative effect on visual acuity and, if left untreated, will cause many visual problems. Evaluating the visual cortex is a method that is commonly used to assess visual acuity in children. Since the assessment of visual acuity in children is difficult, evaluating the visual cortex with specific tests such as VEP and ERG can provide ophthalmologists of Tehran-Iran Noor Eye Hospital with information of the visual pathway (from the retina to the brain).

 Getting acquainted with visual acuity tests

ERG

ERG is the best test that is used to assess visual receptors. This test is performed in children with low vision, whose retinas appear to be healthy, and people with loss of vision of unknown causes. It is also possible to evaluate and record the activity of retinal cells by electrodes. This process helps to diagnose diseases related to visual receptor cells of the retina.

VEP

This test is useful for the assessment of the visual pathways, especially in children. The basis of this test is so that a light suddenly appears or an object suddenly moves or appears on the visual field. For each process, a special response is emitted from the visual cortex of the brain. Measuring these responses allows the ophthalmologist to diagnose the correct disease.

This method is used to detect early genetic diseases of the brain, MS, the assessment of visual impairment that may cause damage to the optic nerve, some of the poisoning, including toxicity due to chloroquine and any damage to the optic nerve. Performing these tests with high precision is now possible at Tehran-Iran Noor Eye Hospital.