Table I
Average Fundus Reflectance for Ten Subjects at Three Different Sites
Wavelength (nm)  Equivalent reflectance in % (coefficient of variation in %)


Nasal fundus  Perifovea  Fovea 

445  1.01 (18)  0.68 (32)  0.23 (29) 
455  1.14 (14)  0.73 (31)  0.25 (30) 
480  1.44 (13)  0.89 (31)  0.33 (30) 
505  1.82 (23)  1.20 (26)  0.58 (26) 
522  1.94 (24)  1.41 (23)  0.94 (18) 
540  1.88 (18)  1.44 (22)  1.11 (14) 
548  2.04 (20)  1.53 (23)  1.18 (13) 
560  2.25 (26)  1.61 (22)  1.24 (14) 
565  2.27 (26)  1.61 (22)  1.26 (15) 
569  2.24 (23)  1.61 (22)  1.28 (15) 
575  2.20 (21)  1.62 (22)  1.29 (16) 
586  2.72 (33)  1.88 (23)  1.48 (18) 
595  4.17 (44)  2.62 (34)  2.11 (30) 
610  6.36 (47)  3.99 (49)  3.30 (49) 
640  8.46 (46)  5.79 (55)  4.97 (54) 
675  10.21 (43)  7.70 (53)  6.68 (52) 
705  11.28 (40)  8.93 (49)  7.83 (50) 
728  11.82 (38)  9.71 (46)  8.63 (46) 
750  11.94 (36)  10.42 (43)  9.30 (44) 
805  12.52 (30)  11.27 (36)  10.37 (38) 
Table II
Equivalent Blood Layer Thickness Calculated with Eq. (6) at 560 and 610 nm for Three Sites in Ten Subjects
Wavelength (nm)  Site  Equivalent blood layer thickness d_{hb} in μm  Linear correlation of d_{hb} with the P index 

560  Nasal fundus  3.9 ± 2.7  −0.73  p < 0.02 
 Perifovea  2.1 ± 0.8  −0.50  n.s. 
 Fovea  1.5 ± 0.7  −0.08  n.s. 
610  Nasal fundus  14.9 ± 6.1  −0.90  p < 0.0004 
 Perifovea  12.7 ± 6.0  −0.92  p < 0.0002 
 Fovea  12.6 ± 6.4  −0.94  p < 0.0001 
Table III
Results of Regressions for ModeII^{a}
Parameter  Unit  Nasal fundus  Perifovea  Fovea 

D_{me}_{,}_{500} (Melanin)  D.U.  0.64 (57) [0.00–1.24]  1.09 (51) [0.45–2.17]  1.16 (50) [0.51–2.20] 
d_{hb} (Hemoglobin)  μm  93 (61) [21–204] r = −0.63 p = 0.05  111 (58) [30–216] r = −0.58 n.s.  99 (58) [32–186] r = −0.74 p < 0.02 
D_{om}_{,}_{420} (Ocular media)  D.U.  0.51 (37) [0.15–0.87] r = −0.66 p < 0.04  0.65 (17) [0.48–0.82] r = −0.12 n.s.  0.66 (21) [0.43–0.93] r = −0.33 n.s. 
r_{pe} (RPE reflector)  %  2.7 (33) [1.6–4.9] r = −0.80 p < 0.006  2.1 (21) [1.5–2.9] r = −0.59 n.s.  1.7 (15) [1.3–2.1] r = −0.59 n.s. 
r_{sc} (Sclera)  %  14 (35) [6–22] r = −0.37 n.s.  16 (31) [8–25] r = −0.75 p < 0.02  15 (33) [8.924.5] r = −0.73 p < 0.02 
PRE  %  3.52  4.03  4.58 
AFR  —  4254  3706  4188 
^{a} See text for explanation of symbols. For each group of data, bold numbers indicate the mean of ten subjects; parentheses indicate coefficient of variation; square brackets indicate range;
r represents the linear correlation coefficient of the parameter with
D_{me}_{,500}; and
p represents the statistical significance of this correlation (
p = 0.05 attained with 
r = 0.63,
n = 10). The densities are single pass through each pigment.
Table IV
Results of Regressions for Model III^{a}
Parameter  Unit  Nasal fundus  Perifovea  Fovea 

D_{rpe},_{500}  D.U.  0.35 (fixed)  0.50 (fixed)  0.60 (fixed) 
D_{me},_{500} (Melanin)  D.U.  0.96 (109) [0.01–3.4]  1.92 (122) [0.22–6.4]  2.13 (139) [0.19–7.9] 
D_{hb} (Hemoglobin)  μm  146 (42) [65–286] r = 0.12 n.s.  182 (48) [61–321] r = 0.11 n.s.  168 (50) [60–304] r = 0.23 n.s. 
r_{pe} (RPE reflector)  %  3.7 (19) [2.8–5.2] r = −0.62 n.s.  2.9 (24) [2.2–4.2] r = −0.42 n.s.  2.3 (16) [1.7–2.8] r = −0.35 n.s. 
D_{x} (Choroidal loss)  D.U.  0.17 (58) [0.05–0.36] r = 0.59 n.s.  0.09 (63) [0.00–0.15] r = −0.27 n.s.  0.10 (79) [0.00–0.22] r = −0.66 p < 0.04 
D_{mp}_{,}_{460} (Macular pigment)  D.U.  −0.016 (208) [−0.08–0.044] r = −0.43 n.s.  0.024 (117) [−0.02–0.08] r = −0.02 n.s.  0.21 (26) [0.12–0.31] r = 0.52. n.s. 
PRE  %  2.74  3.47  4.65 
AFR  —  6882  5245  6593 
^{a} See text for explanation of symbols. For each group of data, bold number indicate the mean often subjects; parentheses indicate coefficient of variation; square brackets indicate range;
r represents the linear correlation coefficient of the parameter with
D_{me}_{,500}; and
p represents the statistical significance of this correlation (
p = 0.05 attained with 
r = 0.63,
n = 10). The densities are single pass through each pigment.