bi-focal
They are called "pince-nez" glasses. These glasses do not have arms but instead have a nose clip or pinching mechanism to stay in place on the wearer's nose.
Grid lines
Those are "meridians of longitude".
Point of interception.
"There! His Majesty can now read my name without glasses. And he can double the reward on my head!" This is a quote by John Hancock. He said those words after signing his name on the Declaration of Independence in large letters.
The transverse lines run horizontal through the fused sacral vertebrae
The Characters name with the glasses is Velma
Pierce nez is the name given to those types of glasses.
The Axieon Somewhere around those lines
line segments
There are more than one major lines of longitude that pass through the Argentine. They have values around 58 degrees west but none of the lines/meridians is a named line.
Two, the cornea and the lense. However if you wear glasses the answer would be three and you would add in the glasses lense.
Those are meridians of constant longitude.