A farsighted librarian wears her 4.05-D refractive power eyeglasses 0.0210 m from her eyes and is able to read books held no closer than 0.280 m from her eyes. As a matter of convenience, she decides to switch to contacts. Determine the refractive power for her contact lens prescription.
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- A person sees clearly wearing eyeglasses that have a power of −2.00 diopters when the lenses are 2.30 cm in front of the eyes. (a) What is the focal length of the lens? cm(b) Is the person nearsighted or farsighted? nearsightedfarsighted (c) If the person wants to switch to contact lenses placed directly on the eyes, what lens power should be prescribed? dioptersProblem 102. My wife Margie has lost most of her accommodation. She has a nearpoint of 130 cm and would like to read as close as 40 cm from her eyes. A) What power reading glasses should Margie use? Assume the lenses in the glasses are 2 cm from the eye. B) What is Margie's farpoint while wearing reading glasses?A large reflecting telescope has an objective mirror with a10.0 m radius of curvature. What angular magnificationdoes it produce when a 3.00 m focal length eyepiece isused?
- 6. A nearsighted man uses his ideally prescribed eyeglasses that have a refractive power of -3.00 diopters. He would like a prescription for contact lenses. What is the correct contact lens distance of 2.0 cm from his eyes? diopters ssf60 ss prescription if he normally wears his eyeglasses a f60 ssf60 pre 0 ssf60 staWhat is the focal length of the lens in your eye when you can focus on an object at your near point? Assume that the distance from your lens to the back of your eye is 2.0 cm, that your near point is 21 cm in front of your lens, and that the liquid behind the lens has n=1.00 just like the air in front of your lens. (a) 1.8 cm (b) 18 cm (c) 2.1 cm (d) 21 cm (e) None of the above.An optometrist needs to prescribe corrective lenses for a person whose near point is q = 58.8 cm. If the patient is to see objects clearly at a distance of p = 25.0 cm, calculate the following. (Neglect the distance from the lens to the eye.) (a) focal length (in cm) of the appropriate corrective lens cm (b) power (in diopters) of the appropriate corrective lens diopters
- Bailey has a eyeglasses with a prescription of -4.00−4.00D. While wearing these glasses so that the lenses sit 2.002.00 cm in front of the eyes, Bailey can see distant object clearly with fully relaxed eyes. a) What is the far point for Bailey's uncorrected vision? b)If Bailey wants to switch to wearing contact lenses placed directly on the eye, what contact lens power should be prescribed? Give your answer in diopters, using the correct positive or negative sign.A patient cannot clearly see any object that lies closer than 32.0 cm to her right eye. However, the patient wishes to see objects as close as 20.0 cm with that eye. The patient requests eyeglasses to address the problem. (a) Is the patient nearsighted or farsighted? nearsightedfarsighted (b) If the eyeglass lens lies 2.10 cm in front of the patient's eye, what is the minimum distance p (in cm) separating the lens from an object she wants to see? (Give your answer to at least three significant digits.) cm (c) The patient is unable to focus clearly on anything closer than 32.0 cm to her eye (this being the patient's near point). The image formed by the eyeglass lens must therefore be 32.0 cm from the eye. How far, then, (in cm) would the image lie from the lens? (Give your answer to at least three significant digits.) cm (d) The image lies on the same side of the lens as the original object. Is the image real or virtual, and is its position q positive or…A farsighted librarian wears her 3.84-D refractive power eyeglasses 0.0300 m from her eyes and is able to read books held no closer than 0.264 m from her eyes. As a matter of convenience, she decides to switch to contacts. Determine the refractive power for her contact lens prescription.