New products and Services
New Rimmed Prism Trial Lenses
Ellivron launch new progressive rimmed Trial Lenses
New Rimmed Prism Trial Lenses produced by Frank Norville’s new company Ellivron Optical
Whilst processing a number of rotating prism projects it came to our notice how those very traditional reduced aperture prism trial rims (pictured right)
It has been overtaken in design terms by a new injection moulded plastic castellated rim model.
This has the distinct advantage of enabling considerably higher levels of dexterity to prevail during handling especially when rotating around a ring holder trial frame.
Its series of plastic protrusions, or castellations around its rim aids this (pictured left).
This standard diameter reduced aperture ring 35mm holds a rectangular prism 20x25mm with powers marked (twice) and arrowhead print for apex and dot for base directions.
48 prism powers per boxed set including a four lens position hand verifier.
The New Rimmed Prism Trial Set is now available from Ellivron Optical
It includes a 48 piece reduced aperture prism set, two rings of each power.
Power Range
- 0.25 to 4.00 in 0.25 increments
- 4.50 to 6.00 in 0.50 increments
- 7.00 to 10.00 in 1.00 increments
