It is very common that your vision zooms out sometimes. I just want you to know that in most cases, this is caused by a blood rush. You know, when you stand up or get up, you had better do all of these gently instead of suddenly and quickly or you will get a blurred vision. What is worse, you may eve pass out. In other words, your blurry vision after those actions are caused by your rapid changing breath and heart rate. When it comes to elder people or old people, they should be more careful of this.