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The fitted intercept in a regression has little meaning if no data values near X = 0 have been observed.
Farsightedness
A common vision condition, also known as hyperopia, where distant objects may be seen more clearly than objects that are near.
Nearsightedness
A common vision condition, also known as myopia, where close objects appear clearly, but distant ones do not, due to the shape of the eye.
Presbycusis
Age-related hearing loss, gradually occurring in individuals as they grow older.
Macular Degeneration
Macular degeneration is a medical condition affecting the macula (part of the retina) that leads to vision loss, most commonly in older adults, characterized by the deterioration of the central portion of the retina.
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