When nearing a tunnel with sunglasses on close one eye before entering the tunnel. After entering the tunnel open the eye.

I would heartily recommend the Helmet Sunblocker strip that goes across the inside of the visor. I wear this on a clear visor and never need sunglasses or a dark visor. It works by negating the glare from the sun where the direct sunlight hits the visor, from above.

The only time it is ineffective is when the sun is below the line of the strip.

I too wear corrective lenses. The lenses that get darker with increasing light levels ALSO get darker as the temperature decreases, And I did not care for that effect. I want maximum darkness, when it is 100 degrees out (I live in Texas).

I suggest that you look at a Nolan N102 helmet. It has an external dark visor that can be lowered or raised independently from the large clear visor (it also has a fog free pinlock visor for the inside of the full coverage visor). To make it better, it has a latch to
lock the shield down, that takes two separate motions to release the lowered shield. It is a modular-style helmet. There are other helmets that have a second dark visor, but the Nolan is the cheapest I am aware of.

I have had similar experiences. I always carry my regular glasses for night use, but that late p.m sun still gives me fits. I think that many helmets have easily replaceable shields. My Harley hemet shield snaps off and on rather quickly. I've ordered a smoked shield to carry. of course, now I have find room for in the saddle bag. Sigh.

Okay Hank, I'll get right on it. :-)

You are the first motorcyclists That have talked about such a problem (late afternoon, low angle sun and the likely occurence of "flicker vertigo" as aviators would call it, when riding through a forrested area). We need a helmet with dual shields, one clear and one dark or smoked for late PM and early AM. I believe fighter pilots have this type. Work on that ,will you?!

Thanks for the tip. I haven't tried adjusting lenses because when I looked at them (years ago) they took too long to make the change when going from indoors to ouside and vice versa.

I wear prescription lenses too and I've had similar problems. I've found that a dark visor and slightly tinted lenses (5%) is a good option for exactly the reasons you mentioned. The slight tint decreases glare from the inner surface of the dark visor.

Have you had any experience with the lenses that adjust to UV levels?