What is Perfect Vision: 66 or 2020?

People claim to have perfect eyesight if they have 2020 vision or 66 vision What does it actually mean? The sole difference is the unit of measurement in

People claim to have perfect eyesight if they have 2020 vision or 66 vision What does it actually mean? The sole difference is the unit of measurement in

666 rummy apk People claim to have perfect eyesight if they have 2020 vision or 66 vision What does it actually mean? The sole difference is the unit of measurement in

666e rummy People claim to have perfect eyesight if they have 2020 vision or 66 vision What does it actually mean? The sole difference is the unit of measurement in