Is there Catholic exegesis on Mark 8:22-26 that explains why people looked like trees?

I vaguely recall a homily from several years ago where the priest explained what Mark 8:22-26 meant when Jesus healed a blind man that he saw other people's blindness (i.e. it was their souls that looked like trees, walking). Venerable Bede says that this is in reference to a person needing to be [purified by degrees](https://en.wikipedia.org/wiki/Blind_man_of_Bethsaida) but what other takes are there on the reason this particular man 1. Wasn't cured at once and 2. Saw people that looked like trees. Looking primarily for historical or contemporary Catholic exegetes.