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A study of Chinese schoolchildren found that after controlling for age, gender, school, parental myopia, father's education, and books read per week, myopia was still associated with high nonverbal IQ. Nonverbal IQ was a more important explanation than books read per week. [63]
Older adults with visual impairment are at an increased risk of physical inactivity, [29] [30] slower gait speeds, [31] [32] [33] and fear of falls. [ 34 ] Physical activity is a useful predictor of overall well-being, and routine physical activity reduces the risk of developing chronic diseases and disability.
Presbyopia is a physiological insufficiency of optical accommodation associated with the aging of the eye; it results in progressively worsening ability to focus clearly on close objects. [4] Also known as age-related farsightedness [5] (or as age-related long sight in the UK [6]), it affects many adults over the age of 40. A common sign of ...
Myopia A number of studies have shown a correlation between IQ and myopia. [6] Some suggest that the reason for the correlation is environmental: either people with a higher IQ are more likely to damage their eyesight with prolonged reading, or people who read more are more likely to attain a higher IQ; others contend that a genetic link exists ...
Elderly people often associate their functional and physical decline with the normal ageing process. [28] [29] The elderly may actually enhance their perception of their own health through social comparison; [30] for instance, the older people get, the more they may consider themselves in better health than their same-aged peers. [31]
Singapore is believed to have the highest prevalence of myopia in the world; up to 80% of people there have myopia, but the accurate figure is unknown. [138] China's myopia rate is 31%: 400 million of its 1.3 billion people are myopic. The prevalence of myopia in high school in China is 77%, and in college is more than 80%. [139]
Some studies suggest, in older adults, developing asymmetric cataracts may cause worsen anisometropia. However, anisometropia is associated with age regardless of cataract development: a rapid decrease in anisometropia during the first years of life, an increase during the transition to adulthood, relatively unchanging levels during adulthood ...
Fundus of geographic atrophy. Geographic atrophy (GA), also known as atrophic age-related macular degeneration (AMD) or advanced dry AMD, is an advanced form of age-related macular degeneration that can result in the progressive and irreversible loss of retinal tissue (photoreceptors, retinal pigment epithelium, choriocapillaris) which can lead to a loss of central vision over time.