A particular patient’s eyes are unable to focus on objects closer than 35.0 cm and corrective lenses are to be prescribed so that the patient can focus on objects 20.0 cm from their eyes. (a) Is the patient nearsighted or farsighted? (b) If contact lenses are to be prescribed, determine the required lens power. (c) If eyeglasses are to be prescribed instead and the distance between the eyes and the lenses is 2.00 cm, determine the power of the required corrective lenses. (d) Are the required lenses converging or diverging?

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

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…

Problem 103. A) How do the lenses in glasses designed to correct nearsighted eyes with no astigmatism differ from the lenses designed to correct nearsighted eyes with astigmatism? B) Why can reshaping the cornea with a laser correct the far vision of a nearsighted person?

A converging lens with a focal length of 83.5 cm is 1.00 m to the left of a convex mirror with a focal length of 50.7 cm. An object is placed 1.00 m to the left of the lens. (a) Where is the final image located? cm ---Select--- (b) The image is: upright inverted (c) What is the overall magnification?

(part 1 of 3) A person with a nearsighted eye has near and far points of 10 cm and 23 cm, respectively. Assuming a lens is placed 2.7 cm from the eye, what power must the lens have to correct this condition? Answer in units of diopter. (part 2 of 3) Contact lenses placed directly on the cornea are used to correct the eye. What is the power of the lens required in this case? Answer in units of diopter. (part 3 of 3) 1 What is the new near point? Answer in units of cm.

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(a) Find the power of the lens necessary to correct an eye with a far point of 26.3 cm(b) Find the power of the lens necessary to correct an eye with a far point of 45.0 cm.