Headlights have never worked properly

When the headlights are on they shine straight out instead of fanning out so you can see a few feet on each side of the road. They are not any better on bright than they are on dim. They shine as if you are in a tunnel. In other words they shine directly out in front of you but not to either side. When you turn a corner it blocks even more of your view. I bought replacement bulbs that were suppose to shine farther out thinking that might help but it did not make any difference. I have taken it to the dealership and had them adjusted but they told me there is nothing they can do to make the lights shine out wider. The way they are now, it as if your peripheral vision is totally blocked. Please help. Thanks.