It usually occurs because of eye fatigue..take frequent  breaks while using  electronic gadgets. Follow 20.20.20 rule that is after every 20 min of work on laptop Or Mobile take a 20 sec break And focus on any object that is 20 feet away. Put eye drop refresh tears 4 times a Day. Keep yourself hydrated

Classic ciliary spasm plus pigment exhaustion of rods and cone. Follow 20-20-20 rule and you'll be fine!

After long exposure to light - screen light in your case; the receptors or sensors in the eye get exhausted and take time to recover. During this phase ; a transient blackout is normal and not very worrisome. You can use frequent breaks to avoid the same and proper posture while working on screen. Also, it adds to your comfort if you use lubricating eye drops like - COMFORTZ EYE DROP 3 times daily.

There is possibility. Pl follow the above instructions. Pl use Refresh tears eye drops, 2drops 3times a day.pl consult ophthalmologist for further evaluation and treatment.

While using digital devices, every 20 minutes, take a 20 second break and look at a distant object 20 feet away. Maintain right posture while using computer. Keep yourself hydrated. Blink more often. Sit away from ac and fan. consult sos