ROTS Vader question.

[southreplicas]

I am working on a 1:4 scaled Episode 3 Anakin / Vader reveal bust and I noticed the the eye lenses are less curved than the other versions.
Are they flat?
Please I need a Vader expert help!

 

[Lan-Ed-Tul]

the rots lenses are FLAT. the rots is a esb mask the scanned into a computer split the image and flopped one side over to make a symetrical face.

the other major change was they used flat lenses instead of a bubble type like the OT masks.