What power of spectacle lens is needed to correct the vision of a nearsighted person whose far point is 28.3 cm? Assume the spectacle (corrective) lens is held 1.52 cm away from the eye by eyeglass frames.

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?

The figure below shows a thin glass (n = 1.50) converging lens for which the radii ofcurvature are R1 = 15.0 cm and R2 = –12.0 cm. To the left of the lens is a cube having a facearea of 100 cm2. The base of the cube is on the axis of the lens, and the right face is 20.0 cmto the left of the lens. (a) Determine the focal length of the lens. (b) Draw the image of thesquare face formed by the lens. What type of geometric figure is this? (c) Determine thearea of the image.

(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.

A nearsighted person has a far point of 25.3cm and is prescribed contact lenses to correct her vision. What lens strength (a.k.a., lens power), in Diopters, should be prescribed? Give your answer using the usual convention of positive values for converging lenses and negative values for diverging lenses.

A person uses corrective glasses of power -8.5 D.  (a) Is this person nearsighted or farsighted?  (b) If the glasses are worn 2.0 cm from the eye, what is the person's far point without glasses?