@Michael:
So to get better control you want the shape to be closer to the base plane and you probably want to apply it to the totally flat version instead of one where the middle/nose area has already been deformed some distance away from the base. And have the base plane going halfway through it. You want to minimize the amount of distance any part of your shape has away from the base plane to reduce expansion or collapsing effect


When i opened koi's file i skipped this and start focused on the frame shape :)
That's because most of problems newbies post on the forum are derived from messy lines and points
As you can see in my animated gif i have flow planes always on the solid,not far from it,this is an essential condition if you want to mantain the shape you want



@koi:
These edges got problems with fillet. I just can make a little fillet of 0,05 cm...

If i want to model the glasses i wear i do in real scale 1:1,then i use the caliper and take dimensions
what i read on the caliper? millimeters...1,2..etc, not 0,05 cm
cm are used by bricklayers,i hope you know what i mean :) ;)



Imagine Moi as a tidy workshop with all essential tools
you work better if your workplane is tidy.... ;)

M