Hi. if it wer my dog, id get my handy bottle of mms spray and apply it to the eyelid. i would not mean to spray it directly on the eyeball. i would prob hold his head calmly and firmly and close his eye with my fingers and i spray on and rub it into the growth. i would hold the dog still for about 30 seconds to allow it to work in.
the spray bottle would be a 100ml size bottle with 30 activated drops and clean water - you know the craic.
i would do this a couple of times daily for about 5 to ten days.
at that id expect to see big results!
im currently doing almost the exact same thing today. marble size lump on dogs back. spraying once a day with strong 50 drop spray bottle.
good results are showing!
best of luck