Table 3. Dose distribution in organs at risk.

	Optic chiasm			Optic nerve left			Optic nerve right
Pat.	min	max	mean	min	max	mean	min	max	mean
1	15.20	39.52	18.69	6.05	63.44	14.25	5.68	25.65	20.40
2	9.60	30.92	16.01	10.97	34.42	18.82	8.41	12.84	10.13
3	6.00	35.44	13.09	5.99	14.94	9.56	4.14	30.37	16.32
4	27.60	42.90	35.83	14.00	46.24	35.76	13.74	38.00	28.49
5	28.20	58.56	51.66	12.42	54.43	46.18	11.63	32.38	24.78
6	18.25	50.36	25.27	8.59	27.49	20.71	7.17	46.39	23.03
7	7.35	46.93	21.43	5.13	11.48	8.56	4.30	25.31	11.75
8	29.77	33.98	32.35	9.47	28.88	14.78	8.17	30.23	12.60
9	5.73	26.62	9.26	7.42	23.79	12.71	4.29	8.20	5.39
10	2.04	32.39	5.09	0.94	4.55	1.35	0.88	3.31	1.19

Doses [Gy] in organs at risk of all patients for 30 treatment fractions are demonstrated. Maximum shielding of the eyeballs resulted in mean doses in the optic nerves from 1.19 Gy to 46.18 Gy (max 63.44, min 0,88 Gy). The mean doses of the optic chiasm ranged from 5.09 Gy to 51.66 Gy (max 2.04 Gy, min 58.56).