A 2021 study found that breast milk was no less effective at treating eye discharge in infants than sodium azulene sulfonate hydrate 0.02% ophthalmic solution (OS). They recommend using breast milk as eye drops for babies up to 6 months of age. However, it is important to note that breast milk is not a sufficient treatment for eye infections or other possible causes of eye discharge. A person should contact a doctor for advice before treating a baby's eye discharge with breast milk.