my "95 carada screen is flush to the top of my 10 ft wall. I put a black curtain on either side of screen and one below it to make my whole wall black surrounding screen thinking it would improve watching experience but I'm getting eye strain now where as before when wall was white I didn't. I find myself squinting on bright scenes. I'm thinking this happens when image goes from dark to bright and my pupil is contracting more than when wall was white? I was thinking of watching again tomorrow night and if eye strain continues removing black curtain from underneath screen and leaving the curtains on both sides leaving wall mostly black with some white unlike previous conditions which were all white or all black.