Two factors worth looking at:
1. Base curve. Some people are bothered by lenses with a high base curve. Talk to an optician.
2. Flicker. Lights that flicker can cause headaches and other issues. This includes many LEDs, especially ones from more than a couple years ago, as well as old CRT monitors. “Driverless” LEDs are a major offender. Some modern “low persistence” displays could also be problematic. (I have no idea why anyone wants a low persistence monitor. I understand why low persistence is useful for VR, but monitors aren’t VR.) There’s a standard called IEEE 1789 that the industry mostly ignores.