Can anybody answer what is the meaning of IRIS in Goo Goo Dolls song?

im curious what is the meaning of Iris, can anybody answer?

Can anybody answer what is the meaning of IRIS in Goo Goo Dolls song?
Asa VH1 Behind The Music fanatic, I know that Johnny Reznik has been quoted saying the thissong was written strictly for the movie "City of Angels" and is therefor highly reflective of the plot. EX."AndI'd give up forever to tiuch you, cause I know that you feelme somehow." If Nicholas Cage leaves his angel form, to be with Meg Ryan, he loses his immortality. Meg playsadoctorin the film, and Nick Cage is standing in the room during her surgery because the PT is goingto die, and he is responsible for the deliverance of the pt's soul. Meg feels his presence in the room, but doesnt know what it is she's sensing.
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The lyrics tell the story of an unknown person's desire to be known by the object of his love. However, he seeks to avoid the notice of others because of possible repercussions. The theme of these lyrics ties in directly to the film, in which an angel falls in love with a mortal woman, and can only stay with her by giving up his angelic nature and becoming mortal.