I have twin brother sister they r 18 yrs old and my sister's mind is working well acc to her age she is pursuing graduation but my brother is in 1st class his mind does not work so effectively .he is not able to differentiate b/w colours .He faces difficulty to understand the very normal things in daily life.overall.. things which a normal person vll do easily its not easy for him to do.acc to doctors his mind vll work but very slowly they don't tll us d soln of this prblm.so plz u tl solution