Hi. This could be laser eye strain. As you tend to work on screens most of your time, it can trigger such experiences and symptoms.
So I am going to tell you some steps that you can take to avoid this. For more information you can consult me directly.
Next Steps
Use 20-20-20 screen rule. After every 20 minutes try to look 20 feet away for 20 seconds to relax your eye strain.
Next you can keep using the refresh tear eyedrops but please be cautious about the shelf life.
Let me know how your last exam went. I will need some refractive details of your visit.
Health Tips
Rest I understand your concern about why this started suddenly. These kinds of visual symptoms can appear without a clear trigger—sometimes related to stress, screen use, or minor changes in how the brain processes visual information. Even though it feels new and alarming, it doesn’t mean something serious is happening.