PURPOSE: To see the display screen, etc., of a computer through a transmission part and to prevent eye fatigue, and to see directly materials, etc., which are used at hand simultaneously by providing the transmission part away from a face.

CONSTITUTION: The transmission part 8 is provided with a cylindrical surface and is properly distant from the face, and its color is complementary to that of a polarizing filter or display screen 1 to eliminate the fatigue of the eyes. When the display screen 1 is seen as shown by a line 4 of sight, the screen is seen through the transmission part 8, but when materials 3 at hand are seen as shown by a line 9 of sight, the transmission part 8 is supported away from the face 10 without cutting the line 9 of sight.