Colloidal Silver to Heal Eye Infections. Dr. James Balch, M.D., (author of Prescriptions for Nutritional Healing), you can use colloidal silver directly in your eyes for Pink Eye & other eye infections (i.e., conjunctivitis). He recommends a few drops in each eye, several times a day, of 5 to 10 ppm colloidal silver. According to Robert O. Young, PhD, (author of The pH Miracle), colloidal silver works wonderfully for both eye AND ear problems (ringing, earache, etc.).