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. Author manuscript; available in PMC: 2010 Aug 6.
Published in final edited form as: Ophthalmic Physiol Opt. 2010 Jul;30(4):339–350. doi: 10.1111/j.1475-1313.2010.00740.x

Table 1.

Number of young [old] observers able to set thresholds for each spatial and temporal frequency combination

Spatial
Frequency
(cpd)		 Temporal Frequency (Hz)
0.5 1.0 2.0 4.0 8.0 16.0
0.25 15 [15] 15 [15] 15 [15] 15 [15] 15 [15] 15 [15]
0.40 15 [15] 15 [15] 15 [15] 15 [15] 15 [15] 10 [1]
0.80 15 [15] 15 [15] 15 [15] 15 [15] 15 [15]   2 [0]
1.20 15 [15] 15 [15] 15 [15] 15 [15] 15 [6]   0 [0]
1.80 15 [15] 15 [14] 15 [13] 15 [12]   5 [0]   0 [0]
2.40 14 [10] 15 [10] 13 [9]   9 [4]   0 [0]   0 [0]
3.00 12 [2] 11 [1]   8 [2]   0 [0]   0 [0]   0 [0]