This verse is also used at Odyssey 1.65 (and compare how the phrasing of Odyssey 1.66 is similar to that of 10.244). There, it is Zeus speaking in response to Athena, saying that he could not overlook Odysseus. Since Iliad 10, like the Odyssey, features Odysseus in a prominent role, the formula seems to be useful and good for introducing Odysseus in a starring role.