The cornea and eye lens have focal lengths of 2.3 cm and 6.4 cm, respectively. Find the net focal length and optical power of the eye.
Added by Brittney W.
Step 1
3 cm and f_lens = 6.4 cm 1/F_eye = 1/2.3 + 1/6.4 1/F_eye = 0.4348 + 0.1563 1/F_eye = 0.5911 F_eye = 1 / 0.5911 F_eye = 1.6920 m Show more…
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a1) Example 2.6: For the cornea and lens of the eye, focal lengths of 2.3 cm and 6.4 cm, respectively. Find the net focal length and the optical power of the eye.
Ravindra Y.
Using your answers from the previous question, and given that the cornea in a typical human eye has a fixed focal length of $2.33 \mathrm{~cm},$ what range of focal lengths does the lens in a typical eye have?
(II) One lens of a nearsighted person's eyeglasses has a focal length of $-$26.0cm and the lens is 1.8 cm from the eye. If the person switches to contact lenses placed directly on the eye, what should be the focal length of the corresponding contact lens?
OPTICAL INSTRUMENTS
The Human Eye; Corrective Lenses
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
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