Conversation so far:
Is there any interesting information about Raymond Berry?
Raymond Berry overcame several physical ailments during his football career
What were some of Raymond Berry's ailments?
Bruised nerves near the sacroiliac joint occasionally caused misalignment in Raymond Berry's back, which in turn affected his legs.
How did the misalignment in Raymond Berry's back affect his legs?
The misalignment caused one leg to become slightly shorter; it was not a permanent condition.
How was the misalignment in Raymond Berry's back fixed?
To alleviate this, Raymond Berry wore a back brace for 13 years in the NFL.
Did Raymond Berry have any other physical problems besides occasional misalignment in his back?
Due to his poor eyesight, Raymond Berry wore contact lenses when he played.

Question: Did the contacts cause any problems?
Self-contained rewrite: Did the contacts cause any problems for Raymond Berry?