Question

A. Where is the near point of an eye for which a contact lens with a...

A. Where is the near point of an eye for which a contact lens with a power of +2.85 diopters is prescribed? B. Where is the far point of an eye for which a contact lens with a power of –1.10 diopters is prescribed for distant vision?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
(a) Where is the near point of an eye for which a contact lens with a...
(a) Where is the near point of an eye for which a contact lens with a power of +2.95 diopters is prescribed? cm (in front of the eye) (b) Where is the far point of an eye for which a contact lens with a power of -1.35 diopters is prescribed for distant vision? cm (in front of the eye)
A patient's far point is 135 cm and her near point is 15.0 cm. In what...
A patient's far point is 135 cm and her near point is 15.0 cm. In what follows, we assume that we can model the eye as a simple camera, with a single thin lens forming a real image upon the retina. We also assume that the patient's eyes are identical, with each retina lying 1.95 cm from the eye's "thin lens." (a) What is the power, P, of the eye when focused upon the far point? (Enter your answer in...
Contact lenses are placed right on the eyeball, so the distance from the eye to an...
Contact lenses are placed right on the eyeball, so the distance from the eye to an object (or image) is the same as the distance from the lens to that object (or image). A certain person can see distant objects well, but his near point is 50.0 cm from his eyes instead of the usual 25.0 cm . Part A Is this person nearsighted or farsighted? Is this person nearsighted or farsighted? This person is nearsighted. This person is farsighted....
The near point of a patient's eye is 54.2 cm. (a) What should be the refractive...
The near point of a patient's eye is 54.2 cm. (a) What should be the refractive power ℛ of a corrective lens prescribed to enable the patient to clearly see an object at 23.0 cm? ℛ =  dpt (b) When using the new corrective glasses, the patient can see an object clearly at 26.8 cm but not at 23.0 cm. By how many diopters did the lens grinder miss the prescription? ? = dpt
A near sighted person has a near point of 12 cm and a far point of...
A near sighted person has a near point of 12 cm and a far point of 40 cm. What power corrective lens is needed for her to have clear distant vision? With this corrective lens in place, what is her new near point?
The far point of an eye is 185 cm. A corrective lens is to be used...
The far point of an eye is 185 cm. A corrective lens is to be used to allow this eye to focus clearly on objects a great distance away. What should be the focal length of this lens? What is the power of the needed corrective lens in diopters?
Contact lenses are placed on the eyeball, so the distance from the eye to an object...
Contact lenses are placed on the eyeball, so the distance from the eye to an object (or an image) is the same as the distance from the lens to the object (or the image). If a person can see distant objects well, but has a nearpoint of 53.0 cm instead of the usual 25.0 cm, what power of contact lenses are needed (in diopters)? The same person now wants to wear glasses instead; they are 1.90 cm in front of...
The distance from the eye lens (i.e. cornea-lens system) to the retina of a particular eye...
The distance from the eye lens (i.e. cornea-lens system) to the retina of a particular eye is 2.02 cm. The power of the eye lens when it is relaxed is 54.1 D. (a) Calculate the far point of the eye. (m) (b) If a corrective lens is to be placed 1.78 cm from the eye, calculate the power of the corrective lens that will allow the eye to focus on distant objects. (D)
A person's left eye has a near point of 43 cm and requires eyeglasses to correct...
A person's left eye has a near point of 43 cm and requires eyeglasses to correct their vision. a) What would the prescription for the left eye? b) A 9.0 mm base curve (radius of curvature) will best fit the person's cornea. Using the material with index of refractive 1.422, what should be the radius of curvature (include the correct sign) fo the other side of the lens? c) What is their new far point after wearing the contact lens?
(a) Find the power of the lens necessary to correct an eye with a far point...
(a) Find the power of the lens necessary to correct an eye with a far point of 23.7 cm (b) Find the power of the lens necessary to correct an eye with a far point of 45.0 cm.