Talk:Prentice position

unclarity

This article has been tagged as having no references since late 2006. In looking at it, I noticed several problems. They're annotated below between ++.

The Prentice Position is a term, from Optics and Ophthalmology. A ray of light incidents in a prism with an angle of 90° to the surface. ++There are several surfaces. does this mean the hypotenuse surface as in the illustration or some other?++ All the deviation, caused by the prism takes place at the other side of it. ++There are several sides of course. Does this always mean which is shares a common edge with the incident side, as in the diagram?++

Plastic prisms and prism bars are made so they are held at the Prentice position. ++this is contradicted in the next paragraph. which is so?++ However, this is only true if the person examined has ortho alignment.++This sentence seems to be a mistake. perhaps 'person' should be 'prism'? What was intended, and what should have been meant?++

Classically, the Prentice position is used only for glass prisms. [1] ++Which implies there is a more modern convention, does it? What is the more modern convention if there is one?++ This is where the prism is perpendicular to the line of sight. ++Whose line of sight?++ With plastic prisms, the prism is held in the frontal position. ++contradicts previous paragraph.++

I'll leave a message, if I can, with editors of this article inviting some corrective input. ww 06:05, 2 September 2007 (UTC)

You are correct. There is an error in this article. I will contact the authors. MD12752 03:53, 11 October 2007 (UTC)