Analysis Of Two Hands

The structure of the poem is in one continual stanza, and is essentially the train of thought of a son sitting in his room whilst his father stays up late reading medical journals.  This includes the literary feature of enjambement, as the lines continue past the end of the physical lines, as though the man's thoughts were running away with him and not forming proper sentences. 

The tone of the poem is sort of contemplative, with the son comparing his hand to his father's hand, finding both similarities and differences.  This may be because, while he loves his father (so seeing similarities between them), there are very obvious differences, which may show the separation between the two of them.  This might be because his father is a very accomplished surgeon (the poem mentions that the father can complete easily thirteen surgeries in a day. 
He compares their hands, both the same size and shape, yet he says they have nothing else in common but that.  This might suggest that he envies the brilliance of his father's hands, and wishes that he could be his father; this may especially be true when combined with the fact that later in the poem, he says his hand may have the chance to be just like his father's.
This feeling and tone of ambition, admiration, and yet distance may indicate that the narrative voice is a child, or maybe the author is writing it from his feelings as a child. 
The language suggests this second option, as it is very formal language, filled with imagery, which would either indicate some kind of child genius or a grown up. 
The theme seems to be admiration, yet annoyance at his father.  He indicates that his father spends many nights up late, maybe meaning that they don't spend any time together at all.  This may be the reason for the distance between them.