A young man visiting Inis Mór had sustained an eye injury that required further medical attention.
The lifeboat launched after 2.30am in calm seas under coxswain Tommy Dirrane and with six crew members onboard, and after collecting the young man proceeded to Rossaveal Harbour.
The patient was then transferred safely to a waiting ambulance and on to University College Hospital Galway for further treatment.
Speaking following the callout, Dirrane said: “Our volunteers had an early morning wake-up call today but that it is what they are trained, willing and prepared to do to help anyone they can.
“All at Aran Islands RNLI would like to wish the casualty a speedy recovery.”