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LLA presbyopic patient has near point as 30 cmand far point as 40 cm. The dioptric power forthe corrective lens for seeing near object is |
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Answer» Explanation: far point (f)=-40 power of lens=reciprocal of its FOCAL length p=1/f according to the formula e, p=1/-40=-2.5D so the answer is -2.5D |
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