You are in the "younger" age group for cataract development, but, not out of the unusual. Bit like me going grey at such an early age.
I'm left wondering how the doc made the diagnosis, and, more imortantly, how it's affected your functionality ? (Can you see okay).
Unfortunately, if you are a pilot, then I guess you have a duty to follow this up, but I' hazard a guess, if you're asymptomatic, it's nothing to worry about.