Anne is farsighted; the nearest object she can see clearly without corrective lenses is 2.4 m away. It is 1.8 cm from the lens of her eye to the retina.
What should the focal length of her contact lenses be so that she can see clearly objects as close as 24.0 cm from her eye?
1/p+1/q=1/f. I keep getting 1.67 and this is wrong and i am stuck