Question

A myopic (nearsighted) person has a far point distance of 150 cm. What is the refractive power of his ideally prescribed eyeglasses if he wears his eyeglasses a distance of 3.0 cm from his eyes?

Answer in dp

Answer #1

A nearsighted man uses his ideally prescribed contact lenses
that have a refractive power of ?2.20 diopters. He would like a
prescription for eyeglasses. What is the correct eyeglasses
prescription if he wears his eyeglasses a distance of 2.70 cm from
his eyes?

A nearsighted man uses his ideally prescribed contact lenses
that have a refractive power of ?3.80 diopters. He would like a
prescription for eyeglasses. What is the correct eyeglasses
prescription if he wears his eyeglasses a distance of 2.20 cm from
his eyes?
in diopters

(1)(A)Your physics study partner is nearsighted. She has a near
point of 50.0 cm from her eyes and she wears eyeglasses designed to
allow her to read a newspaper held at a distance of 22.5 cm from
her eyes. Determine the focal length of her glasses for each of the
following cases. She wears her eyeglasses 1.80 cm from her eyes.
She wears her eyeglasses 2.80 cm from her eyes.
(B)What magnification is produced by a 0.150 cm focal length...

A severely nearsighted person has a far point of 7.10 cm. By how
many diopters should the power of the eyes be reduced when laser
vision correction is performed on this person?

A nearsighted person has a far point located only 202 cm from
his or her eyes.
a) write the equation to find the focal length
b) Solve the above equation
c) Find the power of the lens
d) If this person went to the pharmacy to the area where the
glasses are located, which of the two towers of glasses should they
be standing in front of? Negative or Positive

he far point of a nearsighted person is 6.3 m from her eyes, and
she wears contacts that enable her to see distant objects clearly.
A tree is 19.3 m away and 1.7 m high. (a) When she looks through
the contacts at the tree, what is its image distance? (b) How high
is the image formed by the contacts?

QUESTION: A person has a near point of NP = 95 cm and a
far point of FP = 155 cm. The person wishes to obtain a
pair of bifocal eyeglasses to correct these vision problems. The
glasses will sit a distance d = 1.6 cm from the eyes.
A)Write a formula for the power, P1, of the
upper portion of the bifocals, in terms of the given quantities,
that will enable the person to see distant objects clearly.
P1=________...

A person is having trouble seeing. Bifocals should be prescribed
for him. His far
point is 135 cm. The normal far point is infinity. His near point
is 79.0 cm, but he would
like to hold a book 20 cm from his eyes. What two lenses (with
power in diopters)
should be prescribed?

The far point of a nearsighted person is 8.8 m from her eyes,
and she wears contacts that enable her to see distant objects
clearly. A tree is 16.3 m away and 2.3 m high. (a) When she looks
through the contacts at the tree, what is its image distance? (b)
How high is the image formed by the contacts?

1. What is the optical power of the eye when viewing an object
from a distance of 23.5 cm?
2.What is the far point for a person whose eyes have a relaxed
power of 50.25 D?
3. What power lens is required to correct a myopic (nearsighted)
eye with a far point of 6.50 m? Neglect the distance between the
corrective lens and the eye.
4. What power lens is required to correct a hyperopic
(farsighted) eye with a...

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