All non-temporary employees enrolled in Delta Dental of Iowa are automatically enrolled in the DeltaVision® discount program. This program comes at no extra cost to the employee. Any employee, and their covered dependents, are eligible to use this discount program. DeltaVision® offers discounts on materials such as exams, frames and lenses. DeltaVision can not be used with Avesis vision insurance, you may only use one or the other per purchase. Visit our Vision page for more information on this discount program.