The contrast between a dark house and a sunny day becomes more obvious when people go outside for a while and then go back inside.
The contrast between a good food and bad food becomes more obvious when one eats a lot of good food for a while, and then eats some more bad food.
One could go on forever!
Thank you for sharing your deep scientific observations. :) I will carry your knowledge with me (being sarcastic obviously, thanks for the chuckle).
The brighter the light, the better your vision. I've noticed this effect. In bright sunlight, the aperture opening of my iris is so small that I can see pretty clearly without my glasses.
It is the pinhole camera effect.