A skilled reader will read many words in each block. He or she will only dwell on each block for an instant, and will then move on. Only rarely will the reader's eyes skip back to a previous block of words. This reduces the amount of work that the reader's eyes have to do. It also increases the volume of information that can be assimilated in a given period of time.
A poor reader will become bogged down, spending a lot of time reading small blocks of words. He or she will skip back often, losing the flow and structure of the text, and confusing his or her overall understanding of the subject. This irregular eye movement makes reading tiring. Poor readers tend to dislike reading, and they may find it harder to concentrate, and understand written information.
