The Eye Flashcards
What part of the eye is made up of White fibrous tissue
Sclera
Functions of the suspensory ligaments
-Holds the lens in place
Why the clearest will form when light rays fall on the yellow spot
-Has the highest concentration of cones
Explain how the sclera is structurally different from the lens
-Sclera is opaque
-lens is transparent
-Sclera is non-elastic
-lens is elastic
How a blurred image forms if a person wears spectacles with biconvex lenses while reading a book
-The lenses in the spectacle will refracted the light rays
-The lenses in the eye also refract
-the light rays will therefore be focused on the front of the retina
Name the part of the nervous system which controls the pupillary reflex
Autonomic nervous system
Name the process that allows the eye to form a clear image on the retina
Accommodation
State causes if you have long-sightedness
-the focal length of lens is too long
-decrease in length of the eyeball
-Abnormally flat cornea
Which shape of lens will be prescribed if a person is long-sighted
Convex lenses
Name the ability of humans to focus on an object using both eyes that gives a single vision
Binocular vision
Name the visual defect that occurs when the curvature of the cornea is uneven
Astigmatism
Explain how the sight of a person will be affected if cataracts developed on the lens
-lens will become cloudy
-less light will enter the eye
-causing no sight
The process that occurs when the pupil size changes to the amount of light entering the eye
Pupillary mechanism
