Lens density measurements by two independent psychophysical techniques

Table 1 LEAs measured under scotopic (column 3) and photopic (column 4) conditions

Subject #	Age	LEA ± SD (scotopic)	LEA ± SD (photopic)	LEA ± SD (photopic) L:M = 0.47	LEA ± SD (photopic) L:M = 16.5
1	71	60 ± 5	69 ± 1	75 ± 1	66 ± 1
2^a	34	43 ± 2	33 ± 2	41 ± 2	32 ± 2
3	24	29 ± 2	31 ± 2	39 ± 2	30 ± 2
4	28	37 ± 1	40 ± 4	43 ± 4	34 ± 4
5	28	28 ± 3	28 ± 2	31 ± 1	22 ± 1
6	40	47 ± 2	45 ± 3	49 ± 3	39 ± 3
7	27	52 ± 7	40 ± 7	44 ± 8	34 ± 8
8	40	48 ± 6	39 ± 4	44 ± 5	33 ± 4
9	30	39 ± 9	29 ± 1	37 ± 2	25 ± 2
10^a	36	48 ± 5	31 ± 5	34 ± 4	25 ± 4
11	60	45 ± 5	52 ± 2	57 ± 2	47 ± 2
12	61	64 ± 11	63 ± 2	68 ± 2	58 ± 2
13	53	48 ± 3	44 ± 2	48 ± 3	40 ± 3
14	28	23 ± 3	29 ± 1	33 ± 1	22 ± 2
15^a	26	39 ± 3	26 ± 3	29 ± 3	20 ± 3
16	24	36 ± 4	26 ± 3	29 ± 5	20 ± 5
17	36	30 ± 5	36 ± 3	45 ± 2	35 ± 2
18	32	44 ± 3	38 ± 4	42 ± 4	32 ± 4
19	28	26 ± 1	24 ± 5	29 ± 4	18 ± 4
20	29	24 ± 2	24 ± 3	29 ± 4	20 ± 4
21	28	28 ± 3	29 ± 2	33 ± 3	23 ± 2
22^a	61	38 ± 3	54 ± 1	57 ± 2	47 ± 2
23	46	36 ± 3	34 ± 2	37 ± 2	27 ± 2
24^a	28	29 ± 2	22 ± 2	28 ± 3	17 ± 3
25^a	51	54 ± 4	42 ± 3	44 ± 2	33 ± 2

Significant differences are indicated (^a) in column 1 for 6 subjects. In columns 5 and 6, the LEAs under photopic conditions have been recalculated assuming extreme cone weights of L:M = 0.47 and 16.5, respectively. All ages are in years

ISSN: 2326-0254