Eudonia microphthalma is a moth in the Crambidae family. It was described by Meyrick in 1885. It is found in New Zealand. The wingspan is 15–16 mm. The forewings are blackish, irrorated with white. There is a small ochreous-yellow spot near the base, followed by a faint whitish transverse line. Both the first and second line are whitish, margined by dark. The hindwings are fuscous-grey, becoming darker posteriorly. Adults have been recorded on wing in December.