AUSTIN, Texas — When Michael J. Smith decided to try to play a guitar for a living, he had to look into the abyss.

A deep tunnel vision, Smith says, is a condition that affects him all the time, one that causes him to see everything that is outside his field of vision.

And the only way to stop it is to look through the lens of his eyes.

It started with a dream, Smith told CBS News.

A dream in which he had a guitar.

It was like he had seen a ghost, Smith said.

“It was the beginning of a lifelong obsession with music,” Smith said in an interview.

Smith began playing guitar at age 8.

He’s a guitar player now, and he said the obsession has taken him all over the world, and has affected his relationships with his parents and with his fellow musicians.

He is even now a full-time musician.

He says that if he could see in his dreams, he would be able to play.

“When you’re having a dream about something and you can’t see it, it’s like a nightmare, right?”

Smith said.

“It’s a kind of inner darkness that makes it hard for us to see.”

What is tunnel vision?

According to the National Institute of Neurological Disorders and Stroke, tunnel vision is the inability to see through a narrow window.

It occurs when your pupils dilate, making them appear smaller, and your brain tries to compensate by enlarging your pupils.

A narrow window means that the world is clearly visible.

If you can see inside a narrow space, for example, it can seem as though the world inside is larger than the outside.

It can be difficult to see when you’re in the middle of a noisy street, but if you have a small window in your vision, you might see the car on the sidewalk, or even see a bus approaching.

For example, if your pupil dilates to a small size, your brain assumes that you are looking down a street.

If the size of the street changes, your eyes adjust to the wider space.

It is called tunnel vision.

If tunnel vision doesn’t occur during a noisy night, or when the sun is shining, then your pupils may be too small to see.

What causes tunnel vision?

“It’s probably the result of a combination of genetics and environment,” Smith told ABC News.

“If you have one of those genes that predisposes you to have tunnel vision then you have the predisposition to have this problem, because you may have been exposed to that noise at an early age.”

It can also be due to genetics, he said.

A child’s environment can have an impact on how much your pupils can dilate.

“It’s not a coincidence that there’s a lot of noise around,” Smith added.

Some parents find it hard to believe that their child is experiencing tunnel vision because they think their child has it, but Smith says the problem is often a result of his parents not being able to tell when his son is in tunnel vision mode.

“Some parents can’t tell that their kid’s tunneling is a sign of a neurological problem because they’re not seeing that tunneling,” Smith explained.

“So they don’t know if they’re having the problem because of what they’re doing or their environment.”

In some cases, tunnel blindness is more severe than depression.

It can affect one or both parents, and can last for years.

“When parents have this, they feel that their kids are in tunnel,” Smith says.

“And then they think, ‘Why am I feeling this way?’

They feel like their kid is not having tunnel vision.”

Smith says his parents don’t realize what they are doing to their son.

He also worries that if his parents continue to push him to do something they don “want him to be doing, it could end up putting their kids at risk of developing this problem.”

What are the symptoms of tunnel vision and how is it treated?

Smith says he has tunnel vision but is still in denial that it is happening.

“I’m not sure that I’m going to be able for this to end up in a mental health environment,” he said, “so I don’t want to let them know I have tunneling.

I’m trying to get over it.””

I think it’s really important to educate the parents, not only to try and make sure that they understand it and that they’re getting the best therapy possible, but to help them to be aware of what their son is doing.”