48mm Flat Prisms .25
48mm Corrected Curve Prisms 1.0
Yoked Prism Frame with 360 Degree Compass and Adjustable Nose Piece
38mm Corrected Curve Prisms .25
38mm Flat Prisms 2.0
Yoked Prism Frames with Adjustable Temple
Yoked Prism Frame with Elastic String
