Edging PD for Ft-tops

[SeeClearer]

What PD is customarily used for edging flat-tops and trifocals?

[Barry Santini]

The near pd, calculated from the distance pd, the add power, and the frame wrap angle.

B

[CCGREEN]

The near pd, calculated from the distance pd, the add power, and the frame wrap angle.

B

Huh? Simple question simple answer Barry. Use the near PD. Whats with all the other jargon?

[PRECISIONLAB]

Huh? Simple question simple answer Barry. Use the near PD. Whats with all the other jargon?

Must be a digital FT/Tri

[optical24/7]

Higher the add = shorter focal length = more convergence = narrower (than standard) insets required. Wrap angle is generally not much of an issue unless it's suns with a higher degree of wrap (10+ degrees)