Weird visuals during hike

I noticed when I hike and i look at objects. I start seeing things start to “breathe” like a hallucinogen trip. For example if I look far at a mountain range it looks as if it’s getting closer and going back to its normal distance in a loop. And when I used the bathroom at the trail parking lot after I finished hiking I looked at the wall it started to have the same effect. Anyone else? No other symptoms to accompany