[Skip to Content]
[Skip to Content Landing]
Article
May 1949

A SIMPLIFIED PERIMETER OF WALL TYPE

Author Affiliations

NEWARK, N. J.

Arch Ophthalmol. 1949;41(5):633-636. doi:10.1001/archopht.1949.00900040649013

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.

Abstract

For the simplified wall perimeter which I present I claim nothing original except the idea for the wall suspension.

The wall clamp was taken from an old gynecology table. The supporting bar was made by a blacksmith. Both pieces were chrome plated. The perimeter arm is ¾ inch (1.9 cm.) plywood and is graduated to measure 100 degrees. It was given four coats of jet black paint. I had previously put on four coats of a neutral gray but found that the black paint is much more satisfactory. The point on the end of the arm was a brass cup hook which was straightened out and filed to a point. It points directly on the protractor to the meridian which is being examined. A wooden drawer knob has been screwed onto the back of the arm in order that one may hold it in position by hand in the oblique

First Page Preview View Large
First page PDF preview
First page PDF preview
×