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Of all the stars in the sky, Barnard's star, the next closest beyond Alpha Centauri, appears to move the fastest.
Proportions
The relationship in size, amount, degree, or number between two or more things; often involves mathematical ratio.
Presbyopia
A natural age-related decline in the eye's ability to focus on close objects, usually becoming noticeable in early to mid-adulthood.
Near Vision
The ability to see objects clearly at a close range.
Middle Adulthood
A life stage typically ranging from about 40 to 65 years old, characterized by increased personal and professional stability and adjustments to aging.
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