What environmental factor is least likely to affect eye comfort?

Daylight is least likely to affect eye comfort compared to the other factors listed. This is because while intense sunlight can cause discomfort and glare, natural daylight is generally beneficial for vision and helps in regulating circadian rhythms. The visual system is adapted to daylight conditions, which can enhance visual acuity and comfort.

In contrast, air conditioning can lead to dry eyes due to reduced humidity in the air, which can cause discomfort. Pollution introduces harmful particles into the atmosphere that can irritate the eyes and lead to redness and watering. Temperature fluctuations can also be challenging, as they may contribute to discomfort in the eyes, especially if they lead to significant changes in humidity or exposure to drafts. Thus, while daylight does have its considerations, it is not as inherently discomforting to the eyes as the other environmental factors listed.