As a villager, you already know everyone sees either 99 or 100 blue eyes. You see 99, but you don't know if everyone else sees 99 or 100 (if they have blue it's 99 if they dont it's 100). You knew it before the visitor, and after his statement.

This does not help in deducing if you have blue eyes.

> then they would all suicide

No they wouldn't. Nobody should suicide at all. The visitor saying someone has blue eyes, was already known by every member of the village and every member of the village saw more than 1 person with blue eyes prior. Nothing is different because he said something.

> Since you see 99, you must have blue eyes

I don't know there's 100, so I don't know I have blue eyes.