It's probably not a substitute for the optometrist, but EyeQue VisionCheck could be used as a do-it-yourself prescription finder, and probably will be.
The $69 device is like a small telescope that straps to your smartphone. After registering and setting up a membership, you can take three exams that produce your 'eyeglass numbers.' This is like a glasses prescription. These numbers can be used at online glasses retailers.
According to a CNET reviewer, the device was somewhat challenging at first.
A family could conceivably use this device. Everyone in the family would need their own annual membership.
A $99 device that looks full binoculars is also available and is recommended for families.
