logMAR	OKN detected for trial					Total
	1	2	3	4	5
1.0	✓	X	✓	✓	✓	4
0.9	✓	X	✓	✓	✓	4
0.8	✓	X	✓	✓	✓	4
0.7	✓	X	✓	✓	✓	4
0.6	✓	X	✓	✓	✓	4
0.5	✓	X	✓	✓	✓	4
0.4	✓	X	✓	✓	✓	4
0.3	✓	X	✓	✓	✓	4
0.2	✓	X	✓	✓	✓	4
0.1	✓	X	✓	✓	✓	4
0.0	✓	X	✓	✓	✓	4
final VA = 0.5 logMAR						40