ZuoTi.Pro
Question

1. Suppose the distance from the cornea plus lens (which we simply refer to as the...

1. Suppose the distance from the cornea plus lens (which we simply refer to as the lens through the rest of the problem) to the retina is 25 mm in a person’s eye.

(a) What must the refractive power of the lens be when looking at distant objects?

(b) What must the refractive power of the lens be when looking at an object 15 cm from the eye?

(c) Suppose that the eye is nearsighted; the person cannot clearly see objects further than 0.50 m away. Find the refractive power of the contact lens the person needs to wear so that they can see objects at infinity.

For each part, give your answer in diopters.

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
1. Suppose the distance from the cornea plus lens (which we simply refer to as the...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • NEED HELP ON #2 A nearsighted pharmacy student has eyes who have a relaxed refractive power...

    NEED HELP ON #2 A nearsighted pharmacy student has eyes who have a relaxed refractive power of 49 diopters and her retina is 2.3 cm from her lens. 1). If she is nearsighted, what is her far point? If she is far-sighted, what is her near-point? .1804 m 2) Let's say she wants to be able to focus clearly on objects that are from 150 m to 6.5 cm away. What is the power of the corrective lens she should...

  • (A) What power contact lens in D is needed to correct the vision of a person...

    (A) What power contact lens in D is needed to correct the vision of a person who has a near point of 64.0 cm and allow him to see objects 25.0 cm away? __________ D (B) If this person has a normal 8.00% ability to accommodate (increase) the power of his eyes, what is the maximum distance of objects he can see clearly in m with his contact lenses and with totally relaxed eyes? (Assume a lens-to-retina distance of 2.00...

  • If the cornea were simply a thin lens in air, what would be its focal length?...

    If the cornea were simply a thin lens in air, what would be its focal length? Express your answer in millimeters to three significant figures. Measurements on the cornea of a person's eye reveal that the magnitude of the front surface radius of curvature is 7.88 mm, while the magnitude of the rear surface radius of curvature is 7.28 mm (see (Figure 1)), and that the index of refraction of the comea is 1.38 FAXD ? mm Submit Request Answer...

  • A physicist can see distant things clearly when wearing -2.00-diopter eyeglasses. Each lens rests 1.55 cm...

    A physicist can see distant things clearly when wearing -2.00-diopter eyeglasses. Each lens rests 1.55 cm in front of the eye. (a) What focal length (in cm) describes the lenses? (b) Determine the far point (in cm) for this physicist's eyes. (c) is the physicist nearsighted or farsighted? nearsighted farsighted (d) The physicist decides to replace eyeglasses with contact lenses, one of which rests directly on each eye. What would the contact lens power be (in diopters) in order to...

  • Sometimes a person cannot clearly see objects close up or far away. To correct this type...

    Sometimes a person cannot clearly see objects close up or far away. To correct this type of vision, bifocals are often used. The top half of the lens is used to view distant objects and the bottom half of the lens is used to view objects close to the eye. A person can clearly see objects only if they are located between 40 cm and 198 cm away from his eyes. Bifocal lenses are used to correct his vision. What...

  • The lens-to-retina distance is 2.04 cm, and the relaxed power of the eye is 51.0 D....

    The lens-to-retina distance is 2.04 cm, and the relaxed power of the eye is 51.0 D. What is the far point in m? What eyeglass power in D will help the person see distant objects clearly, if the glasses are 1.80 cm from the eyes?

  • With a near point of 15.0 cm, a nearsighted professor can focus on relatively nearby objects....

    With a near point of 15.0 cm, a nearsighted professor can focus on relatively nearby objects. Yet, with a far point 62.0 cm out, he cannot clearly see distant objects without optical ald. (a) Calculate the focal length (in cm) of a contact lens that would enable this professor to clearly view very distant objects. (Hint: Allow p to approach Infinity in the thin-lens equation). (b) What power (in diopters) describes this contact lens? diopters (c) When this contact lens...

  • The lens-to-retina distance of a woman is 1.92 cm, and the relaxed power of her eye is 54.6 D. (a...

    The lens-to-retina distance of a woman is 1.92 cm, and the relaxed power of her eye is 54.6 D. (a) What is her far point?    How is the refracting power of a person's eye for distant vision related to their far point and lens-to-retina distance? m (b) What eyeglass power will allow her to see distant objects clearly, if her glasses are 1.80 cm from her eyes?   

  • With a near point of 12.0 cm, a nearsighted technician can focus on relatively nearby objects....

    With a near point of 12.0 cm, a nearsighted technician can focus on relatively nearby objects. Yet, with a far point 58.0 cm out, he cannot clearly see distant objects without optical aid. (a) Calculate the focal length (in cm) of a contact lens that would enable this technician to clearly view very distant objects. (Hint: Allow p to approach infinity in the thin-lens equation). (b) What power (in diopters) describes this contact lens? (c) When this contact lens is...

  • Sometimes a person cannot clearly see objects close up or far away. To correct this type...

    Sometimes a person cannot clearly see objects close up or far away. To correct this type of vision, bifocals are often used. The top half of the lens is used to view distant objects and the bottom half of the lens is used to view objects close to the eye. A person can clearly see objects only if they are located between 44 cm and 194 cm away from his eyes. Bifocal lenses are used to correct his vision. What...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT