I already have an active EyeQue All Access Membership with my Personal Vision Tracker. Do I need to purchase another membership for other EyeQue products?

No. If you currently have an active All Access Membership with your Personal Vision Tracker, you will not need to purchase a new membership.  All EyeQue products use the same login information even though each has their own onboarding process.  If you add a device to your account which requires an All Access Membership (such as the VisionCheck), it will extend current All Access Membership by a year.