What are the causes of eye strain and sensitivity to light?

Hi doctor,

I have been experiencing some vision problems for the past couple of months now which has made my eyes strain quite easily on screens (computer, TV, phone). I have also become sensitive to light (most noticeably from car lights and street lights, which are distracting when driving). I cannot seem to ever properly focus while watching television or going to the cinema either, even if I barely had any screen use that day otherwise. I do use my computer extensively during the day as I work from home and also at night for recreation, along with mobile phone use. So, I am sure screen use, in general, may be the leading cause. I saw an optometrist who thought it was just general eye strain and advised lubricating eye drops, which I have been using. I also got a new glasses prescription, but the issue still persists. There is nothing in my family history to have any kind of eye problems. I am looking for advice on what my next steps should be, whether it be a general practitioner, an ophthalmologist, or consulting a different optometrist. Thank you for any help you are able to provide.