marhaq07
The only way you can figure out whether a panel is using KSF backlight is by a reviewer using a colorimeter and verifying it's color gamut (or perhaps showing the SPD - spectral power distribution)
As to whether it will cause you eyestrain, that's subjective and hard to pinpoint precisely due to the ambiguity of everything surrounding it.
You could play it safe by getting a standard backlight display, such as the 24G2ZU, AW2521HF, MAG251RX, VG259QM if you want 1080p.