If the cornea is to be reshaped (this can be done surgically or with contact lenses) to correct myopia, should its curvature be made greater or smaller? Explain. Also explain how hyperopia can be corrected.

If the cornea is to be reshaped (this can be done surgically or with contact lenses) to correct myopia, should its curvature be made greater or smaller? Explain. Also explain how hyperopia can be corrected.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter26: Vision And Optical Instruments

Section: Chapter Questions

Problem 7CQ: If the cornea is to be reshaped (this can be done surgically or with contact lenses) to correct...

See similar textbooks

Related questions

Q: Sam purchases +2.0-D eyeglasses which correct his faulty vision to put his near point at 25 cm.…

A: Power (p) = +2D Near point = 25cm Distance b/w lens and the eyes = 2cm

Q: correct hyperopia (farsightedness), convex lenses are prescribed. If a senior citizen can read a…

A: Given Person cant read it distance is less than 50 cm For him to read from distance 25 cm , lens…

Q: What kind of lens is the lens of the eye? Where does the normal eye form the image? What kind of…

A: Most popular lens are biconvex and biconcave lens

Q: Q4. A convex lens has a focal length of 10cm. What is the power of the lens? O 5D O 20D O 10D 3D

Q: A microscope has an objective lens with a focal length of 16.22 mm and an eyepiece with a focal…

A: Given: Focal length of objective lens, fo=16.22 mm=1.622 cm Focal length of eyepiece, fe=9.02…

Q: Presbyopia is the tendency to gradually become far-sighted (hyperopic) as you age. If you have…

A: A.Using lens formula, the focal length of Eye is

Q: some eyeglasses make a person's eye look bigger and others make their eyes look smaller. Which one…

Q: You have a lens whose focal length is -5.03 cm. You place an object on the axis of the lens at a…

A: Focal length of lens: f = -5.03 cm Object distance from lens: u = 12.3 cm

Q: A myopic person sees that her contact lens prescription is–4.00 D . What is her far point? b.glasses…

Q: A physicist's left eye is myopic (i.e., nearsighted). This eye can see clearly only out to a…

A: Myopic defects arises due to gradual weakening of ciliary muscles and diminishing the flexibility of…

Q: 4.10 Two lenses having focal lengths f, +9.0 cm and f2 apart. If an object 2.50 cm high is located…

A: There two lenses of focal length f1=9 cm and f2=-18 cm placed d=3 cm apart. An object of height…

Q: What power of spectacle lens is needed to correct the vision of a nearsighted person whose far point…

A: strategy:- You want this nearsighted person to be able to see very distant objects clearly. That…

Q: A student makes a microscope using an objective lens and an eyepiece. If she moves the lenses closer…

Q: What are some real world applications of a concave lens? Why might it be useful to use a concave…

A: Application of concave lens in real world are as follow :- Concave lens is used camera Laser…

Q: e curvature of a lens that is concave is 145 cm. There is an object that is 115 cm away from the…

A: We know that the relation between the radius of curvature to the focal length is given as R = 2ff=…

Q: of the figure below. When this lens has air (n, = 1) on its left side and water (nw on its right…

A: Given:- For both lenses, the air is on the left of the lens and water is on the right side of the…

Q: nearsighted man cannot see clearly objects farther than 30.0 cm from their eyes. To prescribe them…

Q: 3. Bifocal lenses are prescribed for a patient, the components having focal length of 40cm & -300cm.…

A: We have to apply lens formula here The lens formula is, 1/f=(1/v-1/u), Where, f is the focal length…

Q: . What is the largest magnification possible with this magnifying glass?

A: Answer for largest possible magnification is 5.0. Explanation is in next step .

Q: What are some real world applications of a convex lens? Why might it be useful to use a convex lens?

A: It is required to discuss some applications of a convex lens.

Q: Can you see a virtual image? Can you photograph one? Can one be projected onto a screen with…

Q: 3. Bifocal lenses are prescribed for a patient, the components having focal length of 40cm &-300cm.…

A: Myopia is an eye defect wherein the objects nearer to the eyes appear clearly and those far off are…

Q: Your optometrist prescribes contact lenses that have a focal length of 50.0 cm. (a) Are you…

A: Given that, f= 50 cm Here f is positive so it means the lens is concave lens We know that concave…

Q: A patient goes to the optometrist and complains that her contact lenses don’t work well any more,…

A: The patient can not see near objects.She can see distant objects only clearly.Hence the patient is…

Q: Suppose you wanted special glasses designed to wear underwater, without a face mask. Should the…

Q: Certain eye conditions increase the curvature of the cornea, which increases the power of this…

A: Introduction: Myopia: Nearsightedness or myopia is the condition where a person is not able to see…

Q: What vision problem can be solved by converging lenses? Explain

A: Converging lens converges the light rays travelling parallel to the principal axis. These lenses…

Q: For a greater magnification, should a lens with a larger or smaller focal length be selected?…

A: For greater magnification, should a lens with a larger or smaller focal length be selected.

Q: Which of the following statements for single optic devices are true? Choose all that apply. a. Any…

Q: r of the combination of a conv

A: We know that the power of the combination of the lens is given as an algebraic sum of the power of…

Q: A microscope has an objective lens with a focal length of 16.22 mm and an eyepiece with a focal…

Q: Which of the following can help to correct of some vision defects like hyperopia, myopia, presbyopia…

A: Hyperopia: It is the defect of vision in which a person is not able to see the near by objects…

Q: Choose the option from each pair that makes the following statement correct. For a nearsighted…

A: Explanation:

Q: When do (known as object distance) is very large, what does the thin lens equation predict for the…

A: The lens equation is, 1/f =1/di- 1/do

Q: Suppose one such individual asks for your help. The patient complains that he can't see far enough…

A: Power of lens is defined as the ability of the lens to converse/diverge the rays falling on the lens…

Q: If the cornea is to be reshaped (this can be done surgically or with contact lenses) to correct…

A: Myopia is a common vision defect, also known as Nearsightedness, that is caused when the shape of…

Q: Choose the option from each pair that makes the following statement correct. For a farsighted…

Q: Question 2 Joseph uses a converging lens (f= 0.10 m) to read a map located 0.080 m from the lens.…

A: Object distance , u = -0.080 m Focal length , f = 0.10 m Using lens equation - (1/f) = (1/v) -…

Q: It has become common to replace the cataract-clouded lens of the eye with an internal lens. This…

A: A cataract-clouded lens of the eye is replaced with an internal lens, so that the person has perfect…

Q: What is the difference between a converging lens and diverging lens? Explain.

A: Converging Lens - A lens which converge the light rays after refraction from the lens, is called…

Q: object.) (a) If the glasses are to be worn 1.0 cm from her eyes, what is the needed focal length?…

Q: A Plano-convex lens (focal length f2 refra index µ2 radius of curvature R) fits exactl a…

A: We know that We have given that the A Plano-convex lens (focal length f2 refractive index μ2 radii…

Q: A nearsighted man wears contact lenses of -3.00 diopters. With these lenses, his corrected near…

A: Given: The corrected near point is do=25 cm. The power of lens is P=-3 D. The expression for focal…

Q: For a person with hypermetropia (far sightedness), the near point has moved to 1.6 m. Calculate the…

Concept explainers

Applications Of Reflection Of Light

When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.

Sign Convention for Mirrors

A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

It has become common to replace the cataract-clouded lens of the eye with an internal lens. This intraocular lens can be chosen so that the person has perfect distant vision. Will the person be able to read without glasses? If the person was nearsighted, is the power of the intraocular lens greater or less than the removed lens?
Will the focal length of a lens change when it is submerged in water? Explain.
If the lens of a person’s eye is removed because of cataracts (as has been done since ancient times), why would you expect a spectacle lens of about 16 D to be prescribed?
If the cornea is to be reshaped (this can be done surgically or with contact lenses) to correct myopia, should its curvature be made greater or smaller? Explain. Also explain how hyperopia can be corrected.
A converging lens has a focal length of 10.0 cm. Locate the object if a real image is located at a distance from the lens of (a) 20.0 cm and (b) 50.0 cm. What If? Redo the calculations if the images are virtual and located at a distance from the lens of (c) 20.0 cm and (d) 50.0 cm.
The accommodation limits for a nearsighted persons eyes are 18.0 cm and 80.0 cm. When he wears his glasses, he can see faraway objects clearly. At what minimum distance is he able to see objects clearly?
Construct Your Own Problem Consider a telescope of the type used by Galileo, having a convex objective and a concave eyepiece as illustrated in part (a) of Figure 2.40. Construct a problem in which you calculate the location and size of the image produced. Among the things to be considered are the focal lengths of the lenses and their relative placements as well as the size and location of the object. Verify that the angular magnification is greater than one. That is, the angle subtended at the eye by the image is greater than the angle subtended by the object.
Use the thin—lens equation to show that the magnification for a thin lens is determined by its focal length and the object distance and is given by m=f/(fd0).
Show that the magnification of a thin lens is given by M = di/do (Eq. 38.6). Hint: Follow the derivation of the lens makers equation (page 1233) and start with a thick lens.
You note that your prescription for new eyeglasses is 4.50 D. What will their focal leng1h be?
Suppose you want to use a converging lens to project the image of two trees onto a screen. One tree is a distance x from the lens; the other is at 2%, as in Figure CQ23.7. You adjust the screen so that the near tree is in focus. If you now want the far tree to be in focus, do you move the screen toward or away from the lens? Figure CQ23.7
A person with a nearsighted eye has near and far points of 16 cm and 25 cm, respectively. (a) Assuming a lens is placed 2.0 cm from the eye, what power must the lens have to correct this condition? (b) Suppose contact lenses placed directly on the cornea are used to correct the person's eyesight. What is the power of the lens required in this case, and what is the new near point? Hint: The contact lens and the eyeglass lens require slightly different powers because they are at different distances from the eye.