Table 1. Photoreceptor cell counts in the different experimental groups (mean ± SD).

	Unexposed	Protected	Unprotected
Location
Z1	541 ± 135	336 ± 64	209 ± 97
Z2	544 ± 136	314 ± 73	104 ± 67
Z3	524 ± 131	367 ± 71	208 ± 73
Z4	605 ± 151	403 ± 86	320 ± 28
Total	2214 ± 552	1421 ± 263	841 ± 214