Do our eyes act as observers at the quantum level? This is a very high level question. I was just thinking about the idea than in quantum physics, the act of observing has a "strange" effect on some properties (e.g. double slit).
If I'm staring at a light bulb, are my eyes having an effect similar to the sensor that plays the role of an observer in the quantum interference experiment?
 A: Observing doesn't have a strange effect on anything. It has an effect that is entirely predictable and comprehensible. Suppose you're doing a double slit experiment and you stick a detector in front of one of the slits. The interference depends on the photon going through both slits, so you're blocking some of the photon's wave function and this prevents interference. You can get the same effect by putting a piece of black card in front of one of the slits, or a hot dog, or whatever. 
More generally, if you interact with a system in such a way as to record some information about it, i.e. - observe it, you may prevent it from undergoing interference: 
http://arxiv.org/abs/1212.3245.
This is not magical or weird, it is a completely straightforward consequence of quantum mechanics.
A: 
I was just thinking about the idea than in quantum physics, the act of observing has a "strange" effect on some properties (e.g. double slit).

People make it seem strange and mysterious when it is not. When you send your beam through a single slit you get a blob if you send it through the left slit you get a blob on the left. If you send it through the right slit you get a blob on the right. Only when they overlap can you get interference.
Sometimes someone might say, if you observe then something different happens. Nothing different happens. But you were lied to when you were told the beam travels in physical space. The wavefunction is defined on configuration space. If the beam going through the right slit was deflected down and the beam going through the left beam was deflected up then you would have a beam on the lower right and the upper right, there would be no overlap and no interference.
This is exactly what happens when you observe. To observe you change the thing that does the observer. The wave exists in a space that keeps track of everything imagine and x,y,z for one particle and an x,y,z for another particle then the eave is assigned in a 6d space and is about configurations. When you observe then the position of the observing thing changes and this is just as real a delection as any other. So you land with one particle in the screen but another particle moved in some direction. You land in a different place in 6d configuration space and so you don't overlap and so you don't interfere.
It isn't strange. Non overlapping beams don't interfere

If I'm staring at a light bulb, are my eyes having an effect similar to the sensor that plays the role of an observer in the quantum interference experiment?

If your eyes move differently based on the slit it went through, then the configurations of it going through one slit are configurations where it lands at x,y,z and your eyeball has a part at X,Y,Z and if the configuration goes through the other slit and lands at x,y,z but your eyeball has a part at A,B,C (instead of X,Y,Z) then the configuration landed at (x,y,z,A,B,C) instead of landing at (x,y,z,X,Y,Z) and so they don't overlap and so there is no interference.
But all you've done is make the beams miss each other in the actual space the beams travel in, the configuration space.
This is no more mysterious then having the two slits deflect the beams up and down so they don't overlap. You are just deflecting the beam in the direction in configuration space corresponding to other particles. It still makes the beam in configuration space miss.
