Diet could be a contributing factor to vision development problems, with calcium deficiency and the consumption of processed foods, refined carbohydrates and sugary drinks potentially harming eye health, an expert said.
Myopia, or short-sightedness, could be related to genetics, environment and lifestyle, as visual development in children continues until about the age of 13, said Huang Hsiu-mei (黃秀玫), an assistant professor in the pediatric division of the School of Nursing at National Taipei University of Nursing and Health Sciences.
While research showed that extended use of electronic devices, insufficient outdoor exposure and academic pressure could increase the risk of myopia, nutrition also plays an important role, she said.
Photo courtesy of Mennonite Christian Hospital via CNA
Recent research showed that overconsumption of refined carbohydrates could be related to myopia, she said, adding that diet is seen as a potentially modifiable risk factor.
Refined carbohydrates are rapidly absorbed, causing spikes in blood glucose and insulin levels, she said.
When insulin levels rise, it could stimulate the secretion of insulin-like growth factors, which in turn promote cell growth and differentiation, Huang added.
This could lead to an increase in the axial length of the eye, raising the risk of myopia, she said.
Moreover, excessive intake of processed foods, refined carbohydrates and sugary drinks could trigger chronic inflammation and oxidative stress, which could affect the health and growth of the sclera, and have adverse effects on eye structure, she said.
Calcium also plays an important role, she said, adding that as it helps maintain the elasticity of the eyeball, long-term deficiency could weaken the sclera, potentially affecting visual development.
However, the relationship between specific dietary patterns, intake levels and their mechanisms in myopia development has yet to be fully verified, Huang said.
Parents are advised to pay close attention to nutrition labels and content when selecting foods for growing children, as excessive consumption of refined sugars over time could affect the balance of essential nutrients, which could have negative effects on vision development, she said.
Children should be encouraged to replace sugary beverages with water, while eating fresh fruits and vegetables could also reduce refined sugar intake, she added.
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