Natural Vision Improvement and Vision Goggles

I received a present from a dear friend, vision goggles. I started trying them 3 days ago on 27th August. Its like a pair of sun glasses that has pin holes in them. They are suppose to help your vision improve naturally but cutting out the extra areas that confuses the eye image. I'm suppose to have a better eyesight by 2-4 weeks time with consistent usage and lessening of the powered lenses.