The patient will then be scheduled with the PC who will obtain appropriate demographic information and administer the outcome measures. Measures will be obtained at the same time as recruitment when ever possible. Results from the outcome measures will be sealed in an envelope, unscored, and delivered to the surgeon co-investigator for warehousing and later analysis. In order to maintain blinding of the PC / PR, she will measure the patient and fit him/her for both devices on the initial visit. The PI will have the proper device ordered according to randomization and will check fitting on its delivery.