The papillary muscles can adjust the shape of the lens. This gives the eye the ability to Focus on near or far objects Discern the intensity of light Reflect light away Change the shape of the object being looked at (i.e. changing a square to a circle.
Added by Daniel H.
Close
Step 1
Papillary muscles are small muscles located in the heart that are responsible for controlling the movement of the heart valves. However, in the context of this question, it seems that the term "papillary muscles" is being used incorrectly. The correct term for Show more…
Show all steps
Your feedback will help us improve your experience
Madhur L and 96 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The human eye focuses by a. changing the thickness of the lens. b. changing the shape of the lens. c. opening and closing the pupil. d. rotating the lens.
Light that enters your eyes is focused to form an image on your retina. The optics of your visual system have a total refractive power of about +60 D - about +20 D from the lens in your eye and +40 D from the curved shape of your cornea. Surgical procedures to correct vision generally do not work on the lens; they work to reshape the cornea. In the most common procedure, a laser is used to remove tissue from the center of the cornea, reducing its curvature. This change in shape can correct certain kinds of vision problems. Part A Suppose a woman has a far point of 45 cm. How much should the refractive power of her cornea be changed to correct her vision? -2.2 D -1.1 D 1.1 D 2.2 D
Penny R.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD