You can see how long before your doctor recommends this for you. I'm betting never.
http://www.alphagalileo.org/ViewItem.aspx?ItemId=141013&CultureCode=en
Humans view the world through two eyes, but it is our brain that
combines the images from each eye to form a single composite picture. If
this function becomes damaged, impaired sight can be the result. Such
loss of visual function can be observed in patients who have suffered a
stroke or traumatic brain injury or when the oxygen supply to the brain
has been reduced (cerebral hypoxia). Those affected by this condition
experience blurred vision or can start to see double after only a short
period of visual effort. Other symptoms can include increased fatigue or
headaches. It is been suggested that these symptoms arise because the
brain is unable to maintain its ability to fuse the separate images from
each eye into a single composite image over a longer period. Experts
refer to this phenomenon as binocular fusion dysfunction.
‘As a result, these patients have significantly reduced visual
endurance,’ explains Katharina Schaadt, a graduate psychology student at
Saarland University. ‘This often severely limits a patient’s ability to
work or go about their daily life.’ Working at a computer screen or
reading the newspaper can be very challenging. As binocular fusion is a
fundamental requirement for achieving a three-dimensional impression of
depth, those affected also frequently suffer from partial or complete
stereo blindness. ‘Patients suffering from stereo blindness are no
longer able to perceive spatial depth correctly,’ says Schaadt. ‘In
extreme cases, the world appears as flat as a two-dimensional picture.
Such patients may well have difficulties in reaching for an object,
climbing stairs or walking on uneven ground.’
Although about 20% of stroke patients and up to 50% of patients with
brain trauma injuries suffer from these types of functional impairments,
there is still no effective therapy. Researchers at Saarland University
working with Anna Katharina Schaadt and departmental head Professor
Georg Kerkhoff have now developed a novel therapeutic approach and have
examined its efficacy in two studies. ‘Test subjects underwent a six
week training program in which both eyes were exercised equally,’
explains Schaadt. The aim was to train binocular fusion and thus improve
three-dimensional vision. Participants in the study were presented with
two images with a slight lateral offset between them. By using what are
known as convergent eye movements, patients try to fuse the two images
to a single image. This involves directing the eyes inward towards the
nose while always keeping the images in the field of view. With time,
the two images fuse to form a single image that exhibits stereoscopic
depth, i.e. the patient has re-established binocular single vision.
More at link.
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