CBSE - X - Physics - The Human Eye and The Colourful World
when a person is looking at the net he sees vertical lines clearly and not horizontal lines .why?and what kind of visionary defect is it and how can it be corrected?
If a person suffers brain damage to an area of the brain that deals with a particular type of visual information the ability to process that information may be impaired. For instance if the region that deals with horizontal lines is damaged, horizontal lines may drop out of the final image, while vertical ones and angled ones are still seen with no problem. Thus a person with this condition may be unable to see horizontal objects such as bookshelves but be able to see the books that are resting on them because their spines are vertical.
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