In DSM-IV dyslexia was included in the learning related disorder while in DSM-V it is included in the specific learning disorder. A survey conducted in the American school children found that in 17 % of the American school children this disorder can be observed. According to one survey amount of dyslexia in India is 9.87 %. This disorder is seen more in the gifts as compared to boys.
The disorder that is developing due to the defects of heredity of nervous system should be known as inability rather than disorder. If a child with this type of inability is trained property and if the capacity of the child is found and properly nurtured the child definitely will be able to progress in life.
In real life examples we can see that; Thomas Edison, George Washington, Albert Einstein, Leonardo da Vinci, Bill Gates etc. were suffering from dyslexia min their childhood.