The photo below is of a retinal hole, found on routine dilation during a regular eye exam. Fluid can get under these and lift the retina off. Where ever the retina gets lifted off you can’t see. So this patient likely will need laser to sort of “weld” around the hole so that if fluid does get under it, it won’t spread.
This case illustrates the importance of routine eye examinations, even for people who don’t need glasses or contact lenses.