Your statement "I have trouble focusing, especially paying attention to details. I also forget things all the time" sounds similar ADHD, but it would be best to talk to a doctor about that to help you out.
There was a thread the other day on HN where the majority of posters shared very negative views on using medication to treat ADHD, many stating that you will become addicted and dependent on the medication.
I need to wear prescription lenses or contacts on a daily basis in order to function, yet I've never heard anyone complain about becoming "dependent" or "addicted" to prescription optics. In my opinion, there's a double standard here simply because we're talking about medication.
The comparison to prescription lenses isn't really accurate. Almost every lens wearer I know (myself included) do not wear lenses all day as they strain your eyes. They have a backup pair of glasses that can be more comfortable and provide the exact same level of visual perception.
But my glasses are on from when I wake up until I go to bed, and I've never felt any eye strain from them. You shouldn't need a backup pair for that reason, there's probably something wrong with your prescription.