What are sun glasses called where you can see normal out of?

Usually sun glasses have a tint when you wear them. However, there are sun glasses when you wear them, you can see clear. Does anyone know the name of these sun glasses? Where can you purchase them?

Why is the Sun called a 3rd generation star?

I heard that the Sun is a 3rd generation star. What does that mean?

What is the process that converts light energy from the sun to chemical energy stored in glucose called?