1. Effect of contrast luminance between target and background
2. Effect of target color
3. Effect of target size
4. Effect of illumination level
* Select one condition.
(1) Illumination level
Photopic level Mesopic level
(2) Target size and luminance contrast between target and background
Size 1deg. 2deg. 4deg. Luminance contrast 0.2 0.4 0.8
Size 2deg. 4deg. 8deg. Luminance contrast 0.4
Select target color up to 3.
Target size 2° Target size 4°
