Characters
I think my sight's improving. Before I could only see a dark blur, now I can see a light blur.
— Han Solo · Star Wars: Episode VI - Return of the Jedi

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker offers a deadpan report of progress that is barely progress: vision that was once a dark smear has become a lighter smear. The humour lies in the cheerful framing of a still-dismal condition, treating a tiny change as reassuring good news.
Context reviewed