Figures in Byzantine art are highly stylized. The goal was to have symbols which clearly represent people, not to portray them as they appear on earth, because the emphasis was on their religious...
-wide open eyes+intensity of soul, spiritual tension, and strong emotion
-frontality=solemn, formal, reverence
-indifference to earthly reality
-flat space-lack of illusionary...
Well, Islamic artwork does not contain images, for these are considered idols and are not aloud in the Islamic religion They instead use calligraphy, a form of writing in flowing and fancy lettering.