The far point of a myopic person is 80 cm. The power of corrective lens will be
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → \( -1.25\,\mathrm{D} \)
A myopic eye cannot see beyond its far point. The corrective lens must take an object at infinity and form its virtual image at the far point, so its focal length equals the far-point distance and the lens is diverging.
\( \displaystyle u = \infty, \qquad v = -80\,\mathrm{cm} \;\Rightarrow\; f = -80\,\mathrm{cm} = -0.80\,\mathrm{m} \)
\( \displaystyle P = \frac{1}{f\,(\mathrm{in\ m})} = \frac{1}{-0.80} = -1.25\,\mathrm{D} \)
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic was removed from the latest NCERT book (2026-27), and it also appears to be out of the CUET 2026 syllabus.
NCERT (Pre-rationalised edition, 2022-23):
The Eye – …
