the glasses on the billboard
what do the glasses represent in the Great Gatsby?
Eyes + glasses means that he watches over everything that goes on around in the valley. His glasses have yellow rims which symbolize being corrupt, in two different ways: all he sees is corruptness, and he sees through the eyes of someone who is corrupt.
Consider what glasses do: sharpen images; provide clearer focus; even changes the appearance of the wearer. Consider, too, where the billboard displaying the ad is located overlooking the valley of ashes, almost God-like. Focus on the entire scene when determining what it means, not just an isolated image. There are a variety of motifs from which to choose: corruption, dishonesty, power, desire. See which one works for you.
The glasses represent a way of looking at things with clarity. Much of the events in the story are unreliably narrated by Nick Carraway, who is often intoxicated or swayed by the materialistic desires of those around him. Think of what a lens does, it allows you to view things. The glasses provide an "all seeing eye" over the world of the story. Consider not what Nick Carraway is seeing, but what these glasses see.
The GOLD or YELLOW rim of the eyeglasses in The Great Gatsby represent the desire for wealth and materialistic things - specifically gained through corruption. The presence of glasses represents moral blindness.