Questions - NG 1. What is the cornea and lens of the eye?...

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NG 1. What is the cornea and lens of the eye? What comparative optical roles do they play. i.e. which provides the most optical power to focus light into the eye? 2. What changes with the crystalline lens of the eye with age? 3. What is the tough protective outside coat tissue of the eye called? 4. How does the eye control the amount of light entering it? 5. What is the consistency of the two chambers of the eye and what are their names? How does the posterior chamber contents change with age? How do older patients notice this? 6. What is the name of the rich sponge layer of blood vessels that nourishes the retina? What tissue layers lie on each side of that layer? 7. What is the diameter of the human eye at birth? At adult size? 8. What are the two different photoreceptors of the eye? How does each contribute to vision function? 9. What would vision be like with only rod photo receptors? 10. Why do our eye movements need to be precise? What vision function(s) depends on this precision in a single eye? For two eyes? DIMARTINO Which of the following is false regarding the rational for pursuing technology in eyecare? a. New technologies will provide the practitioner with information not previously available. b. New technologies will, especially in the short-term, decrease the cost of health care. c. New technologies can lead to greater efficiency in attaining information which can lead to less patient discomfort. d. New technologies can provide higher quality information that will lead to a more accurate diagnosis. The OCT (Optical Coherence Tomographer) instrument uses the principles of which of the following to image the tissue in the eye? a. Sound waves b. X-rays c. Light waves d. Radar waves Which of the following is true about the Optos instrument?
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a. An image of the retina can be obtained with this instrument through a normal (non-dilated) pupil. b. The image only coves about 100 degrees of the retina. c. It takes about 25 seconds for the image of the retina to be acquired. d. The Optos instrument uses the same technology as a commercial LCD camera. The Optos uses two different wavelengths of laser light, one in the green end of the spectrum and the second in the red end of the spectrum. The reason this is important is: a. The two wavelengths are a duplication and ensure that nothing is missed. b. If one laser malfunctions, the other is sure to work so the image can be acquired. c. The FDA required two lasers wavelengths to minimize the light energy the retina is exposed to. d. The green laser is scattered in the superficial inner retina and the red laser penetrates to the deeper layers, enabling pathology to be localized. MOY
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Questions - NG 1. What is the cornea and lens of the eye?...

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