Eye Can See!

After researching in the Oxford Encyclopedia of British Literature I was not able to find anything that supported my last post comparing King Lear and King Leontes, but I did find more about the motif that things are not as they always appear, another theme Shakespeare stretches across his vast variety of plays.
While talking with a student from another Shakespeare class, we discussed how many of Shakespeare's plays involve sight. She explained how many of the major sonnets, speeches and scenes in Shakespeare often involve eyes, sight or something of the like. The point of this post is to begin developing the theme of seeing things as they really are.
In this play, King Lear's foil, Gloucester loses his eyes, and "learns to see." So what does it mean to see?
According to this play and other Shakespeare plays, people and their circumstances are more than meet the eye. When Gloucester loses his eyes, he has to rely on feeling, smelling, tasting and touching in order to understand. It is in the use of these senses that we can accurately see the world around us, not just our eyes.
In a theme analysis by Michael Cummings, he states the common theme that things are not always as they appear is found in other plays such as Macbeth or Othello. This is one of the prominent critical statements made by Shakespeare throughout his works and I'm sure we will see it further develop in King Lear.