Does anyone know what the fuck the difference is between these terms

[CheeseTouch]

I feel like these terms are used to interchangeably but i do know they are referring to different ratios.
IPD ratio (interpupilary distance)
ESR (Eye separation ratio)

 

[ferqq]

Interpupillary distance (IPD) is the absolute physical distance between your pupils. Eye separation ratio (ESR) is a facial proportion measurement calculated by dividing your IPD by your face's total width (bizygomatic/cheekbone width). IPD is used primarily for optics, while ESR determines facial aesthetics

 

[Gudlifer]

I feel like these terms are used to interchangeably but i do know they are referring to different ratios.
IPD ratio (interpupilary distance)
ESR (Eye separation ratio)

ESR is strictly relative to the bizygomatic width, IPD's the same but just like overall, not necessarily relative to the cheeks

 

[CheeseTouch]

Interpupillary distance (IPD) is the absolute physical distance between your pupils. Eye separation ratio (ESR) is a facial proportion measurement calculated by dividing your IPD by your face's total width (bizygomatic/cheekbone width). IPD is used primarily for optics, while ESR determines facial aesthetics

So basically when people say “ipd RATIO” they are referring to ESR

 

[CheeseTouch]

ESR is strictly relative to the bizygomatic width, IPD's the same but just like overall, not necessarily relative to the cheeks

So basically when people say “ipd RATIO” they are referring to ESR

 

[ferqq]

So basically when people say “ipd RATIO” they are referring to ESR

exactly