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March 1958

A New Contact Lens for Recording the ERG in Rabbits

Author Affiliations

Providence, R. I.
Research Fellow of the Retina Foundation, Boston.

AMA Arch Ophthalmol. 1958;59(3):466-468. doi:10.1001/archopht.1958.00940040172022

Electroretinography (ERG) is well known as an aid in establishing diagnosis in several eye diseases and in serving as a tool for pure research. Response, of course, depends on such variables as light source (stimulus), apparatus, size of the pupil, and location of the area of retina which is stimulated; it is also important that records be obtained under constant standard conditions.

The purpose of this paper is to describe a contact lens for use in recording the ERG in rabbits (Fig. 1). The contact lens developed by Riggs in 1941 made it possible to record the ERG in human beings without discomfort. The present contact lens is a modification of the original (Fig. 1C), which, as used with human beings, was equipped with an electrode (E) identical to that shown in Figure 1. This electrode consists of a silver disc cemented into a hole in the contact

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