HPPD is an umbrella term for a variety of different post-trip phenomena.

What are we talking here? Snow, waves, flashbacks, or what?

Acceptance is liberation, Mr Steadfast!

9 Then Saul, still breathing threats and murder against the disciples of the Lord, went to the high priest 2 and asked letters from him to the synagogues of Damascus, so that if he found any who were of the Way, whether men or women, he might bring them bound to Jerusalem.

3 As he journeyed he came near Damascus, and suddenly a light shone around him from heaven. 4 Then he fell to the ground, and heard a voice saying to him, “Saul, Saul, why are you persecuting Me?”

5 And he said, “Who are You, Lord?”

Then the Lord said, “I am Jesus, whom you are persecuting. [a]It is hard for you to kick against the goads.”

6 So he, trembling and astonished, said, “Lord, what do You want me to do?”

Then the Lord said to him, “Arise and go into the city, and you will be told what you must do.”

7 And the men who journeyed with him stood speechless, hearing a voice but seeing no one. 8 Then Saul arose from the ground, and when his eyes were opened he saw no one. But they led him by the hand and brought him into Damascus. 9 And he was three days without sight, and neither ate nor drank.

...

17 And Ananias went his way and entered the house; and laying his hands on him he said, “Brother Saul, the Lord [d]Jesus, who appeared to you on the road as you came, has sent me that you may receive your sight and be filled with the Holy Spirit.” 18 Immediately there fell from his eyes something like scales, and he received his sight at once; and he arose and was baptized.

19 So when he had received food, he was strengthened. Then Saul spent some days with the disciples at Damascus.