Who's eye is the eye we see at the start of Blade Runner?

At the start of Blade Runner, after the beginning credits, we see an eye reflecting the city scape and we see another shot of it shortly afterward where it shows the flames coming out of the oil refineries. My question is: Who’s eye is it? Could it be Roy Batty’s looking at Los Angeles after coming from space? Could it be one of the replicants that gets fried running through an electrical field such as Bryant says to Deckard? Or, maybe it is Deckard himself? I don’t really know if there is an answer myself, but my question is, who do you think it is? Or, does it really matter?

Used to presume it was Holden looking out over the city as he puttered around that shitty, dusty corporate meeting room waiting for his next subject.

But, now I’d rather say
It’s a great, unowned gaze. One of the fundamental establishing elements of the movie’s decentered narrative.

I just thought it could be Tyrell. Still, it just might be deliberately ambiguous.

Or, what if it is God. There’s mention in some of the literature that I have read about the film that Tyrell might be a replicant himself and that there is another Tyrell that actually made the Tyrell we see in the film. Tyrell, I guess, in a way, you could say is God.

While it could be all those that have been suggested, I can’t shake the thought that it’s Roy’s eye. It fits so well with his final speech.

It is Holden’s eye. Get a grip folks.

According to the book Future Tense it is just an eye used in a medical text.

this is a good question and I have always thought it was Deckards but I don’t think there is really a definitive answer. That is an interesting angle Convery.

Thanks for the responses guys. I just thought perhaps it could be the audience watching the film as a voyeur.