Some examples from this set of practice questions
1.
Relating to the human eye, what purpose does the cornea serve?
Answer: protective structure, serves refractive purposes; bends light towards lens
2.
Relating to the human eye, what purpose does the pupil serve?
Answer: controls the amount of light that enters the eye.
3.
Describe dark adaptation.
Answer: Rods become increasingly sensitive to light in conditions of low illumination. eye adjusts to dim setting.
4.
describe the vision challenge myopia, what lens is needed to correct this.
Answer: nearsightedness. trouble with far away objects due to focal point too far from retina. A concave lens is needed.
5.
Describe the vison challenge hyperopia, what lens is needed to correct this?
Answer: farsightedness, trouble with close up images due to lens sending image behind retina. Convex lens is needed for correction.
6.
Which part of the eye contains only cones and is critical for good visual acuity?
Answer: fovea.
7.
describe the cells of the retina: rods and cones.
Answer: rods: see black &white, operate best in dim light, responsible for peripheral vision. cones: see color, function best in bright settings, good for fine visual discriminations.
8.
what is meant by transduction, relating to human vision.
Answer: physical energy is converted into electrical energy. light energy to neural impulse.
9.
What is Lasik eye surgery?
Answer: 60-90 second process to alter curvature of cornea with a laser.
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