Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

The DAMATO Multifixation Campimeter (DMFC) is a white, hand-held tangent screen with a series of numbered fixation targets around a central window, in which a grey or black stimulus is presented briefly by dialling a disc inside the campimeter. Purpose. To devise an abbreviated test strategy for glaucoma detection and predict its sensitivity and specificity. Methods. DMFC examinations were performed with a chart testing 60 points in the central 24° with 3mm stimuli having contrasts of 2.5%, 5%, 10%, 25% and 100% and with a 6mm 100% contrast stimulus. Normal values were determined in 130 normal eyes from individuals of different age groups. Retinal sensitivity curves for each stimulus were derived from 3000 point-for-point comparisons with the Humphrey Visual Field Analyser (HVFA), using a customised thresholding program in 50 glaucomatous eyes. Sector-by-sector comparisons were performed in 50 eyes with raised intraocular pressure with or without visual field loss according to the HVFA Glaucoma Hemifield Test. Results. Approximately 1% of normal eyes less than 60 years old and no older eyes missed the 10% and 25% contrast stimuli in Bjerrum areas 12-20° from fixation. The 50% thresholds of the 2.5%-, 5%-, 10%-, 25%-, and 100%- 3mm stimuli and the 100%-6mm stimulus were 29.0dB, 26.9dB, 24.0dB, 21.1dB, 15.4dB and 2.2dB respectively. An abnormal DMFC result was obtained in 77% of 74 abnormal visual field sectors and in 4% of 456 normal sectors. Conclusions. An abbreviated test examining Bjerrum areas in about 100 seconds per eye should detect defects <10dB in these areas with a specificity greater than 95%.

Type

Journal article

Journal

Investigative Ophthalmology and Visual Science

Publication Date

15/02/1996

Volume

37