Anyone here could give you myriad interpretations as to what the eagle eyes mean. However the question that you need to ask yourself is what do they mean to you? Just like dream symbolism if the interpretation does not resonate with you it is meaningless. As far as the pineal 'waking up' I can't be sure, but you can. Besides the vision what leads you to believe that is what is happening? If more experiences in your life corroborate that then you may very well be onto something. I will say as a final note, depending on the goal of your meditation practice the vision could just be a distraction on the way to something bigger. Take this zen anecdote for example:

A student went to his meditation teacher and said, "My meditation is horrible! I feel so distracted, or my legs ache, or I'm constantly falling asleep. It's just horrible!" "It will pass," the teacher said matter-of-factly.

A week later, the student came back to his teacher. "My meditation is wonderful! I feel so aware, so peaceful, so alive! It's just wonderful!'

"It will pass," the teacher replied matter-of-factly.

Yep its kiki,

I appreciate that you have been meditating for the time that something is strongly introducing to you as it is itself. It could be a different experience from person to person.

I would like to share one of my similar experience. Some hundred hours ago while I'm in sleep suddenly something made me to wake up. After I opened my eyes, I collected my consciousness with all fearful vibrations. I tested it with the thought willing to see a something dangerous (dangerous face that we see in movies). I turned my face to that direction where I pictured it. Finally, I have really seen a devil. I put all my strength to win the situation to take control of myself. I could manage it.

But after all its a play of my self consciousness.