Table 1. Quantitative analysis of LIP retinal damage.
Total number of cones in retinal wholemounts | Cones in predetermined fixed-size circular areas (PCA) | Area of retina | Area of damaged) | Diameter length of damage (µm) | ||||||||||||
Rat | L-cones | S-cones | L-cones | S-cones | (mm2) | region (mm2 | Measured on retinal wholemounts | Measured | ||||||||
Right retina | Left retina | Right retina | Left retina | Right retina | Left retina | Right retina | Left retina | Right retina | Left retina | L-cones | S-cones | L-cones | S-cones | average | by OCT | |
C | 215,894 | 200,429 | 34,892 | 35,707 | 14,521 | 7,025 | 2,556 | 625 | 58.2 | 55.0 | 0.57 | 2.99 | 952 | 1,882 | 1,417 | 1,390 |
D | 219,235 | 223,050 | 41,258 | 35,057 | 17,001 | 7,753 | 1,998 | 496 | 58.3 | 57.6 | 0.76 | 3.92 | 892 | 2,105 | 1,499 | 1,443 |
E | 206,983 | 215,943 | 37,489 | 28,757 | 13,986 | 6,136 | 2,204 | 729 | 56.2 | 57.2 | 0.86 | 3.69 | 986 | 2,039 | 1,513 | 1,404 |
F | 236,874 | 193,050 | 30,980 | 36,994 | 11,587 | 5,897 | 2,369 | 642 | 56.6 | 58.6 | 0.94 | 3.18 | 1,107 | 1,701 | 1,404 | 1,319 |
G | 238,025 | 210,199 | 39,568 | 29,876 | 14,789 | 7,249 | 2,179 | 894 | 58.0 | 59.2 | 0.60 | 3.71 | 774 | 2,114 | 1,444 | 1,373 |
H | 228,654 | 250,188 | 41,274 | 34,340 | 14,568 | 7,568 | 2,089 | 655 | 53.5 | 54.6 | 0.51 | 4.03 | 774 | 2,381 | 1,578 | 1,467 |
I | 211,089 | 208,956 | 40,153 | 36,029 | 11,827 | 8,196 | 2,391 | 584 | 57.6 | 55.4 | 0.53 | 3.46 | 773 | 2,270 | 1,521 | 1,458 |
mean | 222,393 * | 214,545 * | 37,945 † | 33,823 † | 14,040 ‡ | 7,118 ‡ | 2,255 § | 661 § | 56.9 # | 56.8 # | 0.68 | 3.57 | 894 | 2,070 | 1,482 | 1,408 |
SD | 12,320 | 18,512 | 3,821 | 3,202 | 1,860 | 842 | 193 | 125 | 1.7 | 1.8 | 0.17 | 0.38 | 130 | 228 | 63 | 53 |
Total numbers of cones automatically quantified in retinal wholemounts from experimental rats whose left eye had been exposed to Light Emitting Diode-induced phototoxicity (LIP) and were analysed seven days later. The numbers of cones within predetermined fixed-size circular areas (PCA) were also automatically quantified. The total areas of the retinas (Area of retina) as well as the areas lacking L- or S-cones (Area of damaged region) were measured over flat-mounted retinas. The maximum diameters (Diameter length of damage) of the areas lacking L- or S-cones were measured over flat-mounted retinas and also the length of ONL lacking cell nuclei was measured in vivo with OCT. Statistical analysis: *T-test p = 0.369; †T-test p = 0.049; ‡T-test p≤0.001; §T-test p≤0.001; # When compared with the areas of naïve retinas (see Table 2) there were no significant differences (ANOVA p = 0.974).