Contact lenses are made from

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Q: 17 (CDS-I/2011)
Contact lenses are made from

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,57,163,57,74,57,32

keywords: 

{'contact lenses': [0, 0, 0, 1], 'polyvinyl chloride': [0, 1, 1, 4], 'teflon': [0, 0, 1, 1]}

Contact lenses are made from Lucite.

Polyvinyl chloride (option 1) is a type of plastic commonly used in pipes, cables, and medical devices, but it is not typically used in contact lenses. Polystyrene (option 2) is another type of plastic used in various applications, such as packaging materials and disposable utensils, but it is not used in contact lenses either.

Lucite (option 3) is a brand of acrylic material that is transparent, lightweight, and durable. It is commonly used in the production of contact lenses due to its optical properties and biocompatibility with the eyes. Lucite allows light to pass through, providing clear vision when worn on the eyes. It is also able to hold its shape, allowing for a comfortable fit on the eyes.

Teflon (option 4) is a nonstick material commonly used in cooking utensils and industrial applications but is not used in the manufacturing of contact lenses.

In conclusion, the correct answer is option 3, Lucite, which is the material commonly used in the production of contact lenses.