Walsh Glyn, Rafferty Peter, Pearce E Ian
Division of Vision Sciences, Glasgow Caledonian University, Glasgow, Scotland, United Kingdom.
Optom Vis Sci. 2008 Jan;85(1):67-8. doi: 10.1097/OPX.0b013e31815ed786.
To build a simple, low cost, variable-power prism with a linear scale.
A sliding lens system, using the prismatic effect of ophthalmic lenses, was constructed.
The system functions well at low powers using conventional curved form ophthalmic lenses.
The sliding lens variable prism is a useful alternative to the conventional rotating variable-power prism.
