The program is automated. It starts with a light adaptation phase of typically 5 minutes duration followed by a dark phase.
It uses a staircase strategy to follow the evolution of the sensitivity threshold as the eyes adapt to dark.
Tests for false positives are included to evaluate the patient's reliability.
The curve here-by shows a typical result. The ordinate scale is given in dB with a 0 dB level set at 318 cd/m2 (reference of the Goldmann perimeter). The maximum sensitivity level reached by normal subjects is usually slightly below 80 dB.
This program is available on several models of the Vision Monitor:
- MonCvONE for clinical research, including tests with several wavelenths and several locations,
- MonPackONE, for standard clinical exams and
- MonCv3, for screening exams.
For detailed specification,refer to the PDF brochure.