7. A nearsighted man uses his ideally
prescribed eyeglasses that have a refractive power of −2.50
diopters. He would like a prescription for contact lenses. What is
the correct contact lens prescription if he normally wears his
eyeglasses a distance of 2.8 cm from his eyes?
Assume the glasses are 2.8 cm from the person eyes and the person near-point distance is 25 cm when wearing the glasses.
The image distance for distant viewing which is given as -
using a len's formula, we have
1 / d0 + 1 / di = 1 / f
1 / di = (-2.5 m) + (0 m)
di = - (1 / 2.5) m
di = - 0.4 m
Add the eye-to-lens distance
Far point = - di + (0.028 m)
Far point = [(0.4 m) + (0.028 m)]
Far point = 0.428 m
With the glasses, the person can see clearly for all distances greater than 25 cm.
7. A nearsighted man uses his ideally prescribed eyeglasses that have a refractive power of −2.50...
A nearsighted man uses his ideally prescribed eyeglasses that have a refractive power of −3.30 diopters. He would like a prescription for contact lenses. What is the correct contact lens prescription if he normally wears his eyeglasses a distance of 2.00 cm from his eyes?
A nearsighted man uses his ideally prescribed eyeglasses that have a refractive power of −3.50 diopters. He would like a prescription for contact lenses. What is the correct contact lens prescription if he normally wears his eyeglasses a distance of 2.2 cm from his eyes?
A nearsighted man uses his ideally prescribed eyes of -1.85 diopters. He would like a prescript an uses his ideally prescribed eyeglasses that have a refractive power aces He would like a prescription for contact lenses. What is the corect contact lens prescription if he normally wears his eyeglasses 3.00 cm from his eyes? a) 1.75 diopters b) -1.96 diopters c) -1.75 diopters d) 1.96 diopters e) -2.25 diopters
A farsighted man uses eyeglasses with a refractive power of 2.25 diopters. Wearing the glasses 0.030 m from his eyes, he is able to read books held no closer than 0.295 m from his eyes. He would like a prescription for contact lenses to serve the same purpose. What is the correct contact lens prescription, in diopters? 9. A farsighted man uses eyeglasses with a refractive power of 2.25 diopters. Wearing the glasses 0.030 m from his eyes, he is...
A farsighted man uses eyeglasses with a refractive power of 2.25 diopters. Wearing the glasses 0.030 m from his eyes, he is able to read books held no closer than 0.305 m from his eyes. He would like a prescription for contact lenses to serve the same purpose. What is the correct contact lens prescription, in diopters?
A farsighted man uses eyeglasses with a refractive power of 3.09 diopters. Wearing the glasses 0.026 m from his eyes, he is able to read books held no closer than 0.270 m from his eyes. He would like a prescription for contact lenses to serve the same purpose. What is the correct contact lens prescription, in diopters?
A farsighted man uses eyeglasses with a refractive power of 1.85 diopters. Wearing the glasses 0.020 m from his eyes, he is able to read books held no closer than 0.275 m from his eyes. He would like a prescription for contact lenses to serve the same purpose. What is the correct contact lens prescription, in diopters?
A farsighted man uses eyeglasses with a refractive power of 1.80 diopters. Wearing the glasses 0.025 m from his eyes, he is able to read books held no closer than 0.305 m from his eyes. He would like a prescription for contact lenses to serve the same purpose. What is the correct contact lens prescription, in diopters? 1.51 and 1.46 was wrong
A farsighted man uses eyeglasses with a refractive power of 2.10 diopters. Wearing the glasses 0.030 m from his eyes, he is able to read books held no closer than 0.270 m from his eyes. He would like a prescription for contact lenses to serve the same purpose. What is the correct contact lens prescription, in diopters? I keep getting 1.637 but now I believe the answer is 1.75768. Is 1.75768 correct?
7. A farsighted man uses contact lenses with a refractive power of 1.95 diopters. Wearing the contacts, he is able to read books held no closer than 0.250 m from his eyes. He would like a prescription for eyeglasses to serve the same purpose. What is the correct prescription for the eyeglasses if the distance from the eyeglasses to his eyes is 0.020 m? ANSWER IN DIOPTERS