For some individuals, they can attain 20/20 sight acuity, but it takes their visual system A LOT of effort to maintain that clarity. For some, that will mean eyestrain or headaches, but for some, they may not experience major discomfort that they are aware of.
Let 's look at a soccer example:
You can play soccer with regular running shoes, but you often can perform better if you wear cleats. Why? With the cleats you get a better push off and better traction... less EFFORT to perform the task of running and turning. Does that mean that you will become dependent on wearing cleats in order to play soccer? No. You can still play soccer with regular running shoes. Playing soccer with cleats provides benefits to the player and allows him to exert his energy on other aspects of his soccer game.
In many instances, wearing appropriately prescribed glasses for near work (reading/digital devices) can reduce the EFFORT and visual TENSION created by such near tasks. This can help increase ENDURANCE and improve performance. When shown to beneficial, performance lenses may be prescribed.