Its conjuntitis,bird pink eye,very contaious,i put one that wasn't healed yet back in cage and half the other birds got it.Spent $100.00 on meds for 4 birds.Tinitan spelled wrong,from tractor and supply will cure it.Theres two other meds on internet that will cure it also,but I never found any.Theres also a natural med,utopia silver supplement,is what I'm using now its only about$8.00 a bottle. You have to disefect the water and food bowls and don't use them for 2 weeks.Eyes will scab over if it gets bad anough.Dont put back into cage intill eye lid is natural again.I put one back and infected more.I cured 3 and killed about 7.Today in my 10x10 cage I found out they have it again,about 14.00 so far.Pull up avian diseases of the eye,they have some good stuff about it They say finchs get it from bird baths and cant see.Will take 3 or 4 weeks to cure.I put them in separate cages till healed.These will probally get eaten as I have about 50 birds in the cage After I cured 3 the dog got them from bottom of cage.