vaderios said:
Can anyone confirm if there is an actual reference that the DS had the eye in the middle?
-Angel
The design of the DS had changed in production. The matte painting above was scrapped, but it did find its way into the Star Wars Storybook.
By the time the design was changed, the matte paintings and models could be remade, but the DS plans schematics created by John Wash and other ILM'ers either were forgotten about or Lucas just decided not to worry about it.