https://www.youtube.com/watch?v=AZ0Iytpp3Z0

GCN at least gets into the semantics of hat flip up or down.

I wear a hat in summer now under the helmet to catch/funnel sweat. Without, it's hopeless.

Visors are not good for drag, a cap with brim down is better, but if you aren't sweating the seconds, the visor is probably easier and something you are less likely to forget (like me!). Every time I really need a cap I seem to have forgotten to bring one

Also, had a good friend diagnosed with macular degeneration exacerbated by years of significant sun exposure from triathlon and surfing. His eye doctor recommended he move to the Oakley black polarized for minimal light transfer (9%) and also said that the Fire Polarized lens at 10% light transfer is very popular with people who have macular degeneration as it offers improved contrast and depth.

I've never used either, but his experience has certainly made me rethink outdoor activity without sunglasses.

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not as much drag as the rest of your body!
I would choose safety/vision over aerodynamics concerns.

Certain times of the year when it is still very hot I use an old cycling cap to cut that late afternoon glare - but with the headpart of the cap part cut away, so it's just a headband with the small visor. Used to do it back in day before helmets, it's made a comeback in the past few years though, I notice it on the super hot climbing stages.

I think Silca Joshs' suggestion also very good - are you in prescription lenses too?

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Anne Barnes
ABBikefit, Ltd
FIST/SICI/FIST DOWN DEEP
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Thanks for the responses. Ill look into getting the polarized Oakleys or something similar. I do have a couple of cycling caps. Usually don't wear when actually riding, but think I'll try going with that instead of the helmet visor.

I've always been extremely myopic. The sun glare issue I've only really noticed as I got older. I wear contacts, so can get regular sunglasses.