I've been using a Bell helmet with a visor for over 10 years -- I think the model is the Volt, and before that it was something essentially identical -- and I think that visor is the perfect size for what I need: Unlike every cycling cap I've ever worn or seen others wearing, it doesn't block my vision, doesn't limit my above-the-horizon proscenium...but it still keeps sunlight out of my eyes, unlike a cycling cap with its visor flipped up.