Please answer questions below. Please show all your work. 1. The lens system of
ID: 1374591 • Letter: P
Question
Please answer questions below. Please show all your work. 1. The lens system of the myopic eye is best described as: A. Producing too much convergence B. Producing too little convergence C. Producing too much divergence D. Producing too little divergence2. An optometrist examined Anna s eyes. The farthest object she can clearly focus on with her right eye is 50cm away. What is the power of the contact lens required to correct the vision in her right eye? A. -0.50 diopters B. -2.0 C. +2.0 D. +5.0 Please answer questions below. Please show all your work. 1. The lens system of the myopic eye is best described as: A. Producing too much convergence B. Producing too little convergence C. Producing too much divergence D. Producing too little divergence
2. An optometrist examined Anna s eyes. The farthest object she can clearly focus on with her right eye is 50cm away. What is the power of the contact lens required to correct the vision in her right eye? A. -0.50 diopters B. -2.0 C. +2.0 D. +5.0 1. The lens system of the myopic eye is best described as: A. Producing too much convergence B. Producing too little convergence C. Producing too much divergence D. Producing too little divergence
2. An optometrist examined Anna s eyes. The farthest object she can clearly focus on with her right eye is 50cm away. What is the power of the contact lens required to correct the vision in her right eye? A. -0.50 diopters B. -2.0 C. +2.0 D. +5.0
Explanation / Answer
1)
Nearsightedness or myopia is the inability of the eye to focus on distant objects. the ability to view distant objects requires that the light be refracted less. The cure for the nearsighted eye is to equip it with a diverging lens. Since the nature of the problem of nearsightedness is that the light is focused in front of the retina, a diverging lens will serve to diverge light before it reaches the eye.
Answer is (C).
2)
The thin lens equation is
1/ d_o + 1/ d_i = 1/ f
1/ f = 1/ 50 cm
f = 50 cm = 0.5 m
power of the lens is
P = 1/ f = +2 diopters