God- As of now I am looking at my hand...?

yet, is this really my hand, or a conception of my hand within my mind, or is that the image of my hand created by my defective optical organ, or even, an image of what God/the Devil wants me to think what my hands look like, and has made me see like? Or maybe, the hand exist, but what I am seeing as the 'hand' is not really my hand, but what I think (or either God or the Devil deceives me to think) my hand should look like- indeed, am I really seeing this hand or imagining a certain hand and thinking it is mine?