HIGH-RESOLUTION PERIMETRY OF THE CENTRAL VISUAL-FIELD

The Octopus Program M1 was designed for the detection/follow-up of cen tral or paracentral visual field defects in patients with neurological disorders or with macular or perimacular diseases. Within the central 25 degrees visual field, 59 test locations provide a resolution of le ss than or equal to 1.4 degrees. The differential light sensitivity is measured with 'Octopus normal strategy', i.e. a 4/2/1 staircase proce dure. The Program M2X has 81 test locations in the central 10 degrees, giving even higher resolution (less than or equal to 0.7 degrees) of the central visual field. Both programs have 2 phases, the second bein g a re-test. Program M2X's phases are divided into 4 stages and allow interruption anytime.