Visual agnosia is a neurological disorder affecting your ability to solely use your sense of sight to identify everyday items or people. Instead, you have to use other senses to identify everyday items. This condition affects your ability to identify familiar objects using one of your five senses. The word agnosia derives from a Greek word alluding to a “lack of knowledge.”For instance, you would only be able to name a pear by smelling, tasting or touching it. Simply looking at a pear would not help you identify the fruit.
This happens because one of two main visual pathways in the brain is damaged. The first pathway, otherwise known as the “what” pathway, alludes to what you are seeing. The second pathway, or the “where” pathway, is linked to an object’s location. 
You may not have other problems with your vision or with their memory. Yet if you are suffering from this eye disease, you probably have some parts of the cerebral cortex (in charge of processing certain aspects of vision) adversely affected.
The symptoms vary based on the type of agnosias.
If you have general visual agnosia, you cannot identify familiar objects by sight. Apperceptive visual agnosia and associative visual agnosia are two primary kinds of general visual agnosia.
It happens when you find it challenging to identify images your eyes see. According to how severe your apperceptive visual agnosia is, you may be unable to:
You may also experience challengings associating an object with memories of similar objects. That being said, you may be able to draw or verbally describe objects even without explicitly naming them.
Other very specific types of visual agnosia impact your ability to identify some kinds of things, people, places or scenes by sight. If you have one of these specific types, you may also have general visual agnosia.
These specific kinds of visual agnosia include:
You may enjoy good visual acuity (the sharpness of eyesight when your eye doctor examines with an eye chart) even if you have visual agnosia.
It is caused by brain damage or disruptive diseases inside your brain.
Brain damage results in injuries, known as lesions, that impact how those areas work. Some instances of conditions or problems that lead to brain lesions include:
These are diseases that disrupt your brain structure or function, such as the connections between different areas. These brain disruptions affect the communication among various areas of your brain. Situations that lead to these kinds of disruptions include:
A diagnosis of it may necessitate various consultations with an eye doctor, a neurologist and/or other healthcare professionals.
Here is what to expect during the process of diagnosing visual agnosia:
The treatment involves exercises and rehabilitation therapy to help you learn or re-learn everyday tasks. You may also require treatment for any underlying conditions causing visual agnosia like brain tumours.
To maintain your eye health, get regular eye exams by registering in our app, and see your eye doctor if you have any vision symptoms. Your doctor may further refer you to a neurologist for further testing and a diagnosis.
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