Should I get tested even if I occasionally see flashes of light in front of my eyes?

Sometimes, when I look at a computer for a long time or on a tiring day, I feel like a small light flashes in front of my eyes.

Since it appeared briefly and then disappeared, I assumed it was just due to fatigue, but I am wondering if eye strain can cause this sensation or if I need to distinguish it from other causes.

I am wondering if it is necessary to get my eyes checked by an ophthalmologist, especially when these symptoms appear suddenly and frequently, even if my vision is usually fine.