Please correct my grammar mistakes.?

One of Shakespeare’s tragedies, King Lear, has the theme of blindness. Shakespeare demonstrated this theme through the characters of King Lear and Gloucester. King Lear does not physically lose his vision, however he is blind in his lack of insight, understanding and directions. Ear of Gloucester becomes blind physically and also he is in lack of insight, like king Lear does. Shakespeare also demonstrated, not only clear vision can help to see things clear, by these two characters. Lear sees truth near the end of play but Gloucester see things clearly by the middle of the play.