Is the concept of neuroplasticity applicable to visual cortex and how does it affect visual perception? I've been searching about this but all I found was this presentation, which is a bit too technical for me to understand, e.g: Visual Cortical Plasticity

In what way does neuroplasticity affect the visual cortex?

For example, a person that wears glasses, if he/she stopped using them completely or from time to time, will the visual perception and interpretation of blurred data get better by just training? Will that blur also be reduced with training?
Yes, the visual cortex is plastic, even in adults:


  We measured adaptation in the responses of populations of cat V1
  neurons to stimulus ensembles with markedly different statistics of
  stimulus orientation. We found that adaptation served two homeostatic
  goals. First, it maintained equality in the time-averaged responses
  across the population. Second, it maintained independence in
  selectivity across the population.


http://www.nature.com/neuro/journal/v16/n6/full/nn.3382.html


  Plasticity is invoked for encoding information during perceptual learning, by internally representing the regularities of the visual environment, which is useful for facilitating intermediate-level vision--contour integration and surface segmentation. The same mechanisms have adaptive value for functional recovery after CNS damage, such as that associated with stroke or neurodegenerative disease. A common feature to plasticity in primary visual cortex (V1) is an association field that links contour elements across the visual field. The circuitry underlying the association field includes a plexus of long-range horizontal connections formed by cortical pyramidal cells. These connections undergo rapid and exuberant sprouting and pruning in response to removal of sensory input, which can account for the topographic reorganization following retinal lesions. 


http://www.ncbi.nlm.nih.gov/pubmed/22841310