Just thought i would put some info in here for the benifit of all riders and car drivers alike.
If u are out early or late in the day or same in the seasons u will find at times the problem with the sun. thus one was february i think.
If the sun is at your back and u are casting a long shadow in front, the direction u are going, then its 10 to 0ne that u will not be seen. If another vehicle in front of u is looking your way u may as well be a bus or a pantechnican, that driver will be blinded by the sun and there is nothing u can do, even with lights on and high vis u may as well be naked , you will not be seen.
Understanding this should mean that u ride more defensively, position is important and speed and the anticipation of someone getting in your way. should help u be safer, but thats it and its up to u.
For drivers, i usually, if entering a road and the sun is in my eyes to my right, i throw the visor over to the window and tilt it down, this shades my eyes and prevents sun blindness and i can see whats coming. If travelling towards the sun the suns light will be reflected back onto your windscreen by the black or grey plastics of the horizontal part of the consul. it does reduce vision quite considerably so i place a piece of none reflective material over the consul and it totally restores vision. Try it with a black T shirt or other none reflective material it works.
For bikers the moto crosser or adventure helmets are good as they have a long upper part which can shield the eyes from the direct effects of the sun. Otherwise get some electricians tape and put some on the visor at the top and bottom, then the visor can be used up or down and with a slight tilt of the head once again full visibility is gained. Always protect the eyes if visor up but tinted visors and or sunglasses are a total waste of time[ for sunlight] as there will still be invisible or grey areas when wearing them. remember electricians tape. doesnt mattre what colour u could co-ordinate it with the helmet perhaps.