I had a similar sensation and also wondered if an increase in floaters in one eye. Optician refered for a OCT scan which revealed I had what's called a macular hole in one eye. It's an age-related permanent tear in the retina, thankfully static and does NOT lead to full deterioration like macular degeneration. Luckily for me its in my weak eye.
It's worth looking at an amsler grid to see if you can detect any distortion (for me very slight) - this could mean one of several defects some of which are serious. https://www.allaboutvision.com/conditions/amsler-grid.htm Better looked at on paper than on screen I think. any doubts ask an optician about a scan, get a referal or you can pay yourself to get one at a well known high street optician chain.
Hopefully you'll have none of these but highly recommend a check.