Special Features:

Hemispherical projection type 120/230 volt; 50/60 hz; 200 watts max; 1.9x telescope magnif ication; 60 step brightness; 3-sets grey filters; 6 diaphragms; 50 mm diameter area-covering capability; dioptric range in excess of plus or minus 6 diopters; chin rest vertical range in excess of 60mm and lateral in excess of 90 mm; auto and manual operated recording device; patient-activated buzzer; target/background lamp; 2 recording charts; projection surface 300 mm 4 w/white backgnd adj to max brightness 31.5 a s b; 20 x 30 in. Table top; lt mr w/btry; correction lens fr; cleaning brush; silicone cloth; air blower; dust cover; 400 se recording charts; 400 chin-rest pads; 2 target/background lamps; 2 recording chart illum lamps and fuse or ckt breakaers protective device; mead lt perception, peripheral and central flds, and spots; for use in field assemblies only

Properties:

An apparatus for determining the extent of the peripheral visual field on a curved surface.