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A nearsighted person wears eye glass of power 5.5 D for distinct vision is doctor prescribes the correction of 1D in near vision part of his by focal length which is measured relative to the main part of the lens then the focal length of its part of the lens is?
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A nearsighted person wears eye glass of power 5.5 D for distinct visio...
Understanding Nearsightedness and Bifocal Lenses
Nearsightedness, or myopia, requires corrective lenses to help individuals see distant objects clearly. The power of lenses is measured in diopters (D), which is the inverse of the focal length in meters. A person with a power of -5.5 D indicates a focal length of approximately -0.18 meters or -18 cm, which means they can see clearly at a distance of about 18 cm.
Correcting Near Vision
When a doctor prescribes a correction of +1 D for near vision in bifocal lenses, this relates specifically to the lower part of the lens designed for closer tasks, like reading.
Calculating Focal Length of Near Vision Part
- The formula for power (P) and focal length (f) is:
P = 1/f (in meters)
- For the near vision part of the bifocal lens:
Power = +1 D
Therefore,
1 = 1/f
f = 1 meter
Conclusion
The focal length of the near vision part of the bifocal lens, relative to the main part of the lens, is 1 meter. This indicates that the lower portion of the lens is optimized for viewing objects up to 1 meter away, providing the necessary correction for tasks such as reading or other close-up activities.
This combination of lens powers enables the wearer to switch between distant and near vision seamlessly.
Nearsightedness, or myopia, requires corrective lenses to help individuals see distant objects clearly. The power of lenses is measured in diopters (D), which is the inverse of the focal length in meters. A person with a power of -5.5 D indicates a focal length of approximately -0.18 meters or -18 cm, which means they can see clearly at a distance of about 18 cm.
Correcting Near Vision
When a doctor prescribes a correction of +1 D for near vision in bifocal lenses, this relates specifically to the lower part of the lens designed for closer tasks, like reading.
Calculating Focal Length of Near Vision Part
- The formula for power (P) and focal length (f) is:
P = 1/f (in meters)
- For the near vision part of the bifocal lens:
Power = +1 D
Therefore,
1 = 1/f
f = 1 meter
Conclusion
The focal length of the near vision part of the bifocal lens, relative to the main part of the lens, is 1 meter. This indicates that the lower portion of the lens is optimized for viewing objects up to 1 meter away, providing the necessary correction for tasks such as reading or other close-up activities.
This combination of lens powers enables the wearer to switch between distant and near vision seamlessly.
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A nearsighted person wears eye glass of power 5.5 D for distinct vision is doctor prescribes the correction of 1D in near vision part of his by focal length which is measured relative to the main part of the lens then the focal length of its part of the lens is?
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A nearsighted person wears eye glass of power 5.5 D for distinct vision is doctor prescribes the correction of 1D in near vision part of his by focal length which is measured relative to the main part of the lens then the focal length of its part of the lens is? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about A nearsighted person wears eye glass of power 5.5 D for distinct vision is doctor prescribes the correction of 1D in near vision part of his by focal length which is measured relative to the main part of the lens then the focal length of its part of the lens is? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A nearsighted person wears eye glass of power 5.5 D for distinct vision is doctor prescribes the correction of 1D in near vision part of his by focal length which is measured relative to the main part of the lens then the focal length of its part of the lens is?.
A nearsighted person wears eye glass of power 5.5 D for distinct vision is doctor prescribes the correction of 1D in near vision part of his by focal length which is measured relative to the main part of the lens then the focal length of its part of the lens is? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about A nearsighted person wears eye glass of power 5.5 D for distinct vision is doctor prescribes the correction of 1D in near vision part of his by focal length which is measured relative to the main part of the lens then the focal length of its part of the lens is? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A nearsighted person wears eye glass of power 5.5 D for distinct vision is doctor prescribes the correction of 1D in near vision part of his by focal length which is measured relative to the main part of the lens then the focal length of its part of the lens is?.
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