I have veins popping out on my knee cap a bit. They are not painful, but do appear a bit dark. Is this normal? What could it mean? Also, I have a black dot on the end of my veins on my eye. I don t know what it is, I ve been to a doctor and they said I ve probably had it for a long time, but I want a second opinion. My vision is normal, what could this mean? Please answer both questions separately