Jake is nearsighted, and his cousin Janelle is farsighted. Their visual problems are caused by the fact that:
A)the images are not properly focused on the retina.
B)the cornea is clouded due to age or disease.
C)the size of the blind spot has increased.
D)the pupil no longer dilates in dim light.

Question

Quizplus · Accepted Answer

Nearsightedness (myopia) occurs when the eyeball is too long or the cornea is too curved, causing the image to be focused in front of the retina instead of directly on it. Farsightedness (hyperopia) occurs when the eyeball is too short or the cornea is too flat, causing the image to be focused behind the retina instead of directly on it. Therefore, both nearsightedness and farsightedness are caused by the images not being properly focused on the retina.

Jake Is Nearsighted, and His Cousin Janelle Is Farsighted