I have excellent vision (better than perfect) and am very aware of eye strain when using computers. I have been trained in graphics which included exercises for the eyes and am careful with my eyes due to a my main income from photography.
My monitor/vid card are:
ASUS VE247H 24 inch LED Widescreen Full HD 1080p
Asus 1GB GeForce GTX 560TI DirectCUII PCI-E Graphics Card
Rest of PC is mid range around 12 months ago.
Windows 7 64bit, all software on SSD.
ARMA3 video settings are default as installed.