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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Because the leg muscles of children with muscular dystrophy are weak, they must perform the Gowers’ Because the leg muscles of children with muscular dystrophy are weak, they must perform the Gowers’
When the United States gets stuck over a controversial issue—usually something a divided Congress ca When the United States gets stuck over a controversial issue—usually something a divided Congress ca
A William Jennings Bryan poster alludes to religion: “no crown of thorns” and no “cross of gold.” Br A William Jennings Bryan poster alludes to religion: “no crown of thorns” and no “cross of gold.” Br
Although the Democrats and the Republicans represent slightly different slices of the center, those ... Although the Democrats and the Republicans represent slightly different slices of the center, those ...
Prone position. Placement of bolsters under ankles and shoulders, head supported by face cradle. Prone position. Placement of bolsters under ankles and shoulders, head supported by face cradle.
A promissory note has a face value of $6000 and it has a date of issue of June 1 this year. The ... A promissory note has a face value of $6000 and it has a date of issue of June 1 this year. The ...
Video: Mendel's Principles of Dominance, Segregation and Independent Assortment

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