Spend some time with your best instructor and a buddy box. This may well diagnose the problem.

May also be a good idea to get an eye exam. I had cataracts for almost a year before I got to the doc and found out. And if one in one eye is more advanced than the other eye this can really trash your depth perception.

Some meds can change pupil size and cause a similar problem. Also diabetes, especially undiagnosed, can cause visual blurring and loss of depth perception. So maybe get a medical??

Tom