Squiggly lines in your eyes vision are what are known as floaters in your eyes.
Floaters in your eyes happen when the gel like substance that fills up 80 percent of your eye starts to slowly shrink.
The Gel Like substance is used to keep your eye in a round shape.
Usually those eye floaters will go away on their own without treatment but if it does begin to really impair your vision then you should see an eye doctor for treatment.
If the eye floaters are severe enough you may require surgery of the eye to fix your vision and get rid of the eye floaters.