I just had my eyes checked by an ophthalmologist to get the best from my 4K OLED TV. I had been having trouble focusing on subtitles, mainly in the evening. One eye needed slight correction. With my new glasses I've been trying 4K streamed from Prime and I'm not impressed so far. I refuse to buy a 4K player as it'll send me into another disc buying cycle. Instead I'm buying Blu-rays of classic titles before they disappear. I'm happy with my replacement S6700, so far it's performed well.