what is mental model for blind?

What is blind perception of their environment? and how can blind imagine objects in their brain? (explain this point as minutely)

What are the criteria for measuring this perception?

the blind can explore objects by tactile sense, Kinesthetic sense, sound or both, what is the difference in objects imagination for blind between different exploration methods.

what is the difference between imagine objects in real or virtual environment for blind

how can visually impaired identify and explore the new object at the first time.

the requirement & limitation of touch sense for visually impaired to identify the real or virtual object.

is there difference between blind since birth or later in the mental model or imagine things in the brain?

is there difference between blind and low vision in the mental model or imagine things in the brain?

is there difference between blind and sighted person in the mental model or imagine things in the brain?
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