a) Speaking of the recurrent allusion to clear "sight": How does Shakespeare work this concept on both literal and spiritual levels throughout the play, especially after Cornwall blinds Glouster to extract information about Lear's whereabouts in Act II, Sc VII?
b) What does "legitimate Edgar" learn as the action develops? How does he transform from the dupe of Act I to the force of devotion, order, and heroism in Act IV and V?