I think that eye will rapidly get better if you bathe it in salt water. Dissolve 1teaspn salt in boiled and cooled water. Use luke warm or room temperature. Iwrap my duck in a towel and then hold him against my body with one arm leaving the and free to hold the bill/head and my other hand for wiping the eye. You can use small cotton wool balls or small pieces of clean old cloth. Wet the swab/cloth inthe salt water solution and hten wipe the eye once and discard. Use a fresh cotton wool ball or piece of cloth for each wipe.
WHen an eye is discharging I might bathe the ees three times a day decreasing to twice and hten once a day as it gets better.
@duckmom216, your duck's eye looks like it would only need wiping once a day for a few days. If you haven;t started tetramycin or terramycin eye ointment, you might not need any. That isn't a bad eye infection and will get better quickly with bathing. If you are already using the eye ointment, then continue -- apply each day after you have washed the eye with salt water
