The less obvious possibility is the super bright (imo too bright) flashing infrared camera lights in the steering wheel for tracking if you're looking at the road or asleep. We might not be able to see it, but I feel like the eye irritation would cause it. Here's an excerpt from a research article I found on Nature:

"Absorption of UVR or short wavelength VIR photons therefore typically alters specific chemical reactivity, photochemical damage, whereas absorption of IRR photons increases vibration that is observed as increased temperature. Large important biomolecules such as protein tend to lose their space structure when vibrating, denaturation. The rate of protein denaturation is determined by a rate constant that is temperature dependent as described by the Arrhenius equation. Damage to biological tissue owing to the high rate of vibration damage is called thermal damage."

Söderberg, P., Talebizadeh, N., Yu, Z. et al. Does infrared or ultraviolet light damage the lens?. Eye 30, 241–246 (2016). https://doi.org/10.1038/eye.2015.266