Wirtschafter J D, Prater B N
Surv Ophthalmol. 1978 Nov-Dec;23(3):177-82. doi: 10.1016/0039-6257(78)90154-6.
In an effort to return to the simplicity intended by Goldmann, the authors propose adoption of a two-digit stimulus value (SV) nomenclature for defining targen area luminance and contrast on a properly standardized Goldmann-type perimeter. The system is designed to aid the examiner in target selection, mental interpolation and isopter construction, and to facilitate computer manipulation.