Which line on the eye chart can you read without guessing?

How to say “Which line on the eye chart can you read without guessing?” in Japanese

In Japanese

視力表(しりょくひょう)の何段目(なんだんめ)まで、当(あ)てずっぽうじゃなく読(よ)めますか？

Shiryokuhyō no nandanme made, atezuppō ja naku yomemasu ka?

Which line on the eye chart can you read without guessing? in other languages