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The ABDO Rule is an extremely useful and veratile tool with the following frame measurement capabilities:
Front of Rule:
- Interpupillary Distance (Lower scale for right handed person, upper scale for left handed person)
- Horizontal Lens Size
- Vertical Lens Size
- Distance Between Lenses
- Boxed Centre Distance
- Joint Size
- Crest Height
- Bridge Projection
- Distance Between Rims
- Bridge Height
- Bridge Width
- Frame Temple Width
- Frame Head Width
- Length of Drop
Reverse Side of Rule:
- Apical Radius
- Splay Angle of Pad
- Frontal Angle of Pad
- Distance Between Pad Centres
- Distance between Pad Tops
- Height of Pad Centres
- Height of Pad Tops
- Width of Pad
- Angle of Side
- Length to Bend
- Total Length
- Downward Angle of Drop
- Angle of Let-Back
- Length to Tangent.
Supplied with full instructions.
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