G3701–ὀπτασία–optasia

And when he came out he was not able to say anything, and they saw that he had seen a vision in the Temple; and he was making signs to them without words.

ὀπτασίαν optasian “a vision”

And it was not there; then they came saying that they had seen a vision of angels who said that he was living.

ὀπτασίαν optasian “a vision”

So, then, King Agrippa, I did not go against the vision from heaven;

ὀπτασίᾳ, optasia “vision,”

As it is necessary for me to take glory to myself, though it is not a good thing, I will come to visions and revelations of the Lord.

ὀπτασίας optasias “visions”