The blind people or people who see very little, take it only the essentials, whatever registers most significantly on their remaining senses.

According to the narrator,  people with good eyesight often  fail to see what is right in front of them as they have too many things to see.

The girl did not notice the narrator at first as he was sitting in a dark corner of the compartment.

The narrator thought that his voice must have startled the girl because she was unaware of anybody else’s presence in that compartment. 

The narrator initiated the conversation with the girl by asking her whether she was going all the way to Dehra.