It goes unsaid that fit is vital - sufficient stack reach and really all aspects of the fit critical to comfort. BUT, If you all could go with me here and assume my fit is solid - anyone found any exercises/strength routine or something of that manner they found helpful to improve vision or eyestrain with looking up the road, and perhaps reduce tension in the high-neck?

I don't notice this on even long trainer rides because I think because I drop my head quite a bit more. Outside I am fine for 20-30 miles, but beyond that is where I run into some trouble on the road. I do drop my head somewhat on the road but less than the trainer, by necessity. Maybe helmet weight contributes? I don't feel a lot of tension, its more of a fatigue in the neck and a crosseye feeling after looking "up" for a while.

I think this came up before and stack was the answer, but curious if you all have other ideas. I've added back about 20 mm stack over the past few months and I don't feel it made a big difference other than making me look even less pro.