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Q. For the myopic eye,the defect is cured by

UPSEEUPSEE 2010Ray Optics and Optical Instruments

Solution:

In myopia, $u=\infty, v=d=$ distance of far point
By $\frac{1}{F}=\frac{1}{v}-\frac{1}{u}$, we get $f=-d$
Since $f$ is negative, hence the lens used is concave.