does mdd cause problem in reading a lenghty lesson or reading a story?

[Silla Bakht]

I am a student and I ' m 19 years old I have suffering from this since my childhood.I am usually day dreaming abut love , pride,success and it's rare that I think about any fictional charac ter.

Anyways it is not any important thing what I want to know about from mdd community is that  dd cause any hurdle in reading because I am suffering from this and it's really difficult to concentrate in studies :(