I really would not worry abou this. It is very common . Many if not most diabetics show some signs of he disease in heir eyes but this does not mean that it is likely o progress. Just think of it as a benchmark - somehing o measure future screenings by,
Many posters here have had the same result withoout any further deterioration.
Keeping your levels low but stable is all that you can do
It is quite common for T2s to have been diabetic for some time before diagnosis. I really don't think
that you have any cause for concern. Even a referral to he eye clinic does not necessarily mean you need to worry unduly- many people attending the clinics do not need treament it is merely to keep them under observation so that any problems can be dealt with more quickly.
Its a commomn problem wih any type of screening - it causes anxiety. Good luckwith your bypass.
I hope it gives you new lease of life.