article_snippet.sent: Scores lower than 11 are poor, scores between 15 and 20 is 'lower than average', 21 to 30 is considered normal or average, and a score higher than 31 means your eyesight is considered great' Although the game appears relatively simple, and starts with a board of just four coloured squares, the game quickly grows to a board of up to 81 squares.
article_snippet.sent: The app makers said scores lower than 11 are poor, scores between 15 and 20 is 'lower than average', 21 to 30 is considered normal or average, and a score higher than 31 means your eyesight is 'great.' '
highlights_snippet.sent: And a score of 31 or above is a considered a sign of 'great eyesight' 