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Woman over 50 reading a book without needing glasses. Glasses can be a fashion statement—even people with perfect vision might don a pair just for fun.
An Egyptian method of determining the time during the night, used from at least 600 BC, was a type of plumb-line called a merkhet. A north–south meridian was created using two merkhets aligned with Polaris, the north pole star. The time was determined by observing particular stars as they crossed the meridian. [24]
Glasses may also house other corrective or assistive devices. After the development of the transistor in the 1940s, combined eyeglass-hearing aids became popular. With thick-rimmed glasses the fashion at the time, a hearing aid could be concealed in the temple part of the frame. These fell out of fashion after the 1970s, but there are still ...
Check out these smart famous glasses wearers: Researchers at the University Medical Center in Germany linked spending more time in school and People who wear glasses are smarter, study claims Skip ...
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Visual or vision impairment (VI or VIP) is the partial or total inability of visual perception.In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. [6]
Specifically, a 2011 nationally representative survey of American parents of children from birth to age 8 suggests that TV accounted for 51% of children's total daily screen time, while mobile devices only accounted for 4%. [9] However, in 2017, TV dropped down to 42% of children's total daily screen time, and mobile media devices jumped up to 35%.
The Star-Telegram talked to eye doctors about what looking at a solar eclipse actually does to human eyes and how to know if the eclipse has left you with eye damage. What does looking at a solar ...