Question

HEYE,




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An eye specialist suggested a +2D lens to the person with defect in the vision .
Which kind of defect in the vision does he have ?

Draw diagrams to show the defect of vision and its correction with suitable lens.​

Answer 1

Answer:

$\huge \fbox \red{❥ Question}$

An eye specialist suggested a +2D lens to the person with defect in the vision .

Which kind of defect in the vision does he have ?

Draw diagrams to show the defect of vision and its correction with suitable lens.

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It denotes the convex lens. Usually the convex lens is used to correct

• Hypermetropia
• Long-sightedness
• Difficulty of near vision

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Answer 2

AANSWER :-

•He has an eye defect named \bold{Hypermetropia}Hypermetropia .

•As the value of power of lens is positive .

\boxed{Hypermetropia}

Hypermetropia

—> It is called as Far sightedness

—> A person with this defect can’t see object at near distances clearly.

—> The focal length of eye lens formed is greater than 2.27cm

—> When rays comes from near objects ,after refraction at eye lens ,the image is formed beyond retina.

—> For people of this defect,the eye lens can form the image on retina when object is placed beyond far point.

—>So to correct this defect we use the eye lens which forms an image of an object beyond near point.The object is between near point and least distance of distinct vision.

—> We use biconcave lens to correct defect of hypermetropia

Refer attachment :)