Reading Glasses For Me, Too?

Lately, my wife has been having problems with eye strain in one of her eyes, probably due to being constantly in front of her laptop. This made me think about my eyesight. I thought that maybe 15-20 years from now I may need to start wearing reading glasses. Both my parents started to use one when I was in college - they were about 45-50 years old then. There is a high possibility that I would end up that way, too. I hope that by that time Zenni Optical $ 8 Rx Eyeglasses still exist. I like the Incredible Stylish New Frames From Zenni because they are not expensive. The Variable Dimension Frames From Zenni don't cost much because Zenni Optical manufactures them and sells them directly to customers. I wonder what age my 20/20 vision would last?