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What are near point and normal focusing?...

What are near point and normal focusing?

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Near point focusing
The image is formed at near point, i.e. 25 cm for normal eye. This distance is also called as least distance D of distinct vision. In this position, the eye feels comfortable but there is little strain on the eye.
Normal focusing - The image is formed at infinity. In this position the eye is most relaxed to view the image.
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