Table 1. Pilot study under various conditions.

VGB Dose (mg/kg)	Light	Exposure (hours)	Mouse	Total eyes	Negative	Positive	Comment
1000	cycle	24	2	4	4	0
1000	light	24	4	8	8	0
1000	light	12	1	2	2	0
1000	light	6	1	2	2	0
1000	dark	12	1	2	2	0
1000	dark	6	1	2	2	0
1500	cycle	24	2	4	3	1
1500	light	24	2	4	3	1
2000	cycle	24	2	4	3	1	1 died overnight
2000	light	24	2	4	4	0	1 died overnight
2000	cycle	12	1	2	2	0
2000	light	12	1	2	2	0
3000	cycle	24	1	2	2	0	1 died overnight
3000	light	24	1	2	2	0	1 died overnight
3000	light	12	2	4	3	1
3000	dark	12	1	2	1	1