Thus, when asked to grasp a presented object with his right hand, he would miss it regularly, and would find it only when his hand knocked against it. The reaching ability of the patient is also altered. It takes them longer to reach toward an object. Their ability to grasp an object is also impaired. The patients performance is even more severely deteriorated when vision of either the hand or the target is prevented. Cause
The visual difficulties in Bálints syndrome are usually due to damage to the parieto-occipital lobes on both sides of the brain. The parietal lobe is the middle area of the top part of the brain and the occipital lobe is the back part of the brain. (It usually does not affect the temporal lobes)

Diagnosis
Lack of awareness of the syndrome may lead to misdiagnosis such as blindness, psychosis, or dementia. Symptoms of Bálints syndrome are most likely to be noticed first by optometrtists or ophthalmologists during an eye check up, or therapists providing rehabilitation following brain lesions. However, due to the scarcity among practitioners of familiarity with the syndrome, the symptoms are often explained away incorrectly without being considered as a possibility and followed by medical confirmation of clinical and neuroradiological findings. Any severe disturbance of space representation, spontaneously appearing following bilateral parietal damage, strongly suggests the presence of Bálints syndrome and should be investigated as such. One study reports that damage to the bilateral dorsal occipitoparietal regions appeared to be involved in Bálints syndrome.
Bálints syndrome is an uncommon and incompletely understood triad of severe neuropsychological impairments: inability to perceive the visual field as a whole (simultanagnosia), difficulty in fixating the eyes (oculomotor apraxia), and inability to move the hand to a specific object by using vision (optic ataxia). It was named in 1909 for the Austro-Hungarian neurologist and psychiatrist Rezső Bálint who first identified it.Bálints syndrome occurs most often with an acute onset as a consequence of two or more strokes at more or less the same place in each hemisphere. Therefore, it occurs rarely. The most frequent cause of complete Bálints syndrome is said by some to be sudden and severe hypotension, resulting in bilateral borderzone infarction in the occipito-parietal region. More rarely, cases of progressive Bálints syndrome have been found in degenerative disorders such as Alzheimers disease or certain other traumatic brain injuries at the border of the parietal and the occipital lobes of the brain. Lack of awareness of this syndrome may lead to a misdiagnosis and resulting inappropriate or inadequate treatment. Therefore, clinicians should be familiar with Bálints syndrome and its various etiologies. Presentation
Bálints syndrome symptoms can be quite debilitating since they impact visuospatial skills, visual scanning and attentional mechanisms. Since it represents impairment of both visual and language functions, it is a significant disability that can affect the patients safety—even in ones own home environment, and can render the person incapable of maintaining employment.