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. 2018 Jun 21;9:1017. doi: 10.3389/fpsyg.2018.01017
Object Range Visual Angle
2 6.56° × 9.53° (5.5 × 8 cm)
3 9.53° × 9.53° (8 × 8 cm)
4 8.34° × 10.71° (7 × 9 cm)
5 10.71° × 14.25° (9 × 12 cm)
6 11.89° × 14.84° (10 × 12.5 cm)
7 11.89° × 14.25° (10 × 12 cm)
8 13.07° × 15.15° (11 × 13 cm)
9 14.25° × 15.15° (12 × 13 cm)
10 11.89° × 16.59° (10 × 14 cm)