This is probably somethng worth getting checked out in a vet clinic-just in case. Personally I would agree that surgery at his age is probably not the best option.
If it is a cataract your bunny will slowly lose the ability to see. However a lot of blind rabbits do remarkably well. One of my rabbits has really bad eyesight, and the main thing is to try and keep his environment consistent. That is, don’t move stuff too often, keep important stuff in the same places, dont place things in the places he likes to run around etc.

The rescue I got one of my rabbits from actually had two very happy and very capable cataract buns, so surgery is not always the only option at all.
However I would encourage you to first get it checked by the vet in case it is some kind of infection or internal bleed causing the clouding in his eye

I suggest you take the bunny to a vet for a diagnosis. While it may look like a cataract, there are other possibilities like glaucoma (which can sometime look similar), symptoms of E. Cuniculi or even cancer. You really need a vet to diagnos before you start thinking about treatment options.

My sadly recently passed, 11 year old boy, Bindi, developed cloudiness in one eye, then the other. There was partial and then complete vision loss. I suspected cataracts but my vet confirmed they were not. She also did a pressure test to determine if there was increased eye pressure as this can be painful and would need treatment. We never determined what the cause was, sadly.

To be honest I can’t tell what is in the eye or a reflection from the background. Vet check for sure. Our little girl had cataracts. One eye first then the other eye a year or two later. Our vet confirmed cataracts. And everything was just like Dface said. She got around fine because she knew the layout of the land. We didn’t change anything around on her. She did however learn to slow down after running into my ankles and sometimes the wall. I think she learned to use memory, very limited, if any sight, and her whiskers as feelers to get around. She seemed perfectly happy regardless.

It’s hard to see in the picture, but it looks similar to the normal cloudiness that can develop with age. Leopold is starting to get a touch of that and the vet said it was age-related. Since it’s only in one eye though, I would have a vet check it out. There are other, more serious things that can cause cloudiness as well.

I can’t really tell in the photos either but I agree that it’s worth getting checked out. Cloudy spots in eyes can be a symptom of E.c and its important to treat for E.c as early as possible. Even if it is a cataract that doesn’t mean you need to do surgery. I probably wouldn’t for an 11 year old who still had good vision in the other eye. But I do agree that you should have it checked out by a vet. At least with a vet diagnosis of cataract you can have some peace of mind.

Ditto the others. Really can’t tell from a picture. Too much glare. You need a vet to check her eyes with a light.