Does accutane get rid of and prevent milia under the eyes?

Not really. Accutane works with oil glands. Milia are not caused by oil glands. Usually people prone to milia are overly aggressive with their skin - rubbing, scrubbing, touching, and this is why they are prone to milia. The best course for stopping milia is a mild cleanser, keep your hands OFF your skin, and use a Clarisonic twice a day. "This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."