Question

A person with myopia is not able to see beyond 1.5 what would we say plans to retain visions​

Answer 1

$\huge{\bold{Answer\: :}}$

The power of myopic corrective lens with vision at 1.5 m  =  -0.66 D.......✔✔✔

$\huge{\bold{explanation\: :}}$

• To correct myopia or nearsightedness concave lens is used.......✔✔✔

• Myopic persons cannot see objects beyond a distance of 1.5 m and hence the correction must be to reduce the eye’s focusing power, so minus lenses are used........✔✔✔

• The minus lenses focus the image directly on the retina. The power of lenses is expressed in Diopters........✔✔✔

• The lens power for a corrective myopic glass begins with a minus sign. The power of lens according to the lens formula is: , where D is the lens power in Diopter and f the focal length........✔✔✔

• So if the focal length is 1-5 m, then the power of corrective lens for myopic patient would be:.......✔✔✔

                                       

• So, the power of myopic corrective lens with vision at 1.5 m  =  -0.66 D........✔✔✔

$\huge{\bold{solution\: :}}$

• u = infinity v = -1.5m

• P = 1/f = 1/u - 1/v

• =1/-15 =-0.66 D.......✔✔✔

Answer 2

Answer:

Explanation:

A person with myopia will use concave lens because in myopia a person cannot see the distant object or the image is formed before Retina so the concave lens will diverge the light and image will be formed on the retina.

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