what does 20 15 eyesight mean（関連順）

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20/40 Vision or Visual Acuity means

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The average person blinks 15-20 times per minute.#blinks #blinkings eyes

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Blink frequently to prevent dry eyes. Aim for an average of 15 blinks per minute on your screen.

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What does it mean to have "dove's eyes"?

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結果 : what does 20 15 eyesight mean