Retina holes can lead to retina detachments. In this case, it appears that this hole has been around a long time. It is likely that some retina specialists would just watch this without treatment. Others would treat it.
Since it is an old one that is inferior, this one doesn’t need to be seen by the retina specialist on an emergency basis. I am, however, having this patient see the retina specialist within a few weeks to see if he wants to laser it. Lasering around the hole or using cryotherapy (freezing), essentially welds the retina down to prevent it from becoming a detachment.