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CNS USA Exam 3 Questions & Answers 2024/2025
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CNS USA Exam 3 Questions & Answers 2024/2025 What are the 3 layers of the human eye? - ANSWERSSclera, Choroid, and Retina From the inside out, how does the structures of the eye lie? - ANSWERSOuter sclera, transparent cornea Anterior chamber (Aqueous humor) Iris Pupil Lens Posterior ch...

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  • September 23, 2024
  • 22
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • cns usa exam 3 questions answers

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CNS USA Exam 3 Questions & Answers
2024/2025

What are the 3 layers of the human eye? - ANSWERSSclera, Choroid, and Retina



From the inside out, how does the structures of the eye lie? - ANSWERSOuter sclera, transparent cornea

Anterior chamber (Aqueous humor)

Iris

Pupil

Lens

Posterior chamber (Vitreous humor)

Retina



What type of photoreceptors does the retina contain? - ANSWERSRods and Cones



Which photoreceptors function is vision in low lighting? - ANSWERSRods



Which photoreceptors function is color vision and high spatial/temporal resolution? - ANSWERSCones



What are the 8 layers of the retina starting at the direction of light? - ANSWERSStratum opticum

Ganglion cell layer

Inner plexiform layer

Inner nuclear layer

Outer plexiform layer

Outer nuclear layer

Pigmented layer

,Which type of cells continue as the optic nerve? - ANSWERSGanglion cell axons



Depression in the center of the macula where eyesight is maximum (maximum visual acuity) is called? -
ANSWERSFovea centralis



The macula is located where? - ANSWERSon the retina and surrounds the fovea



Photoreceptors are high in which region of the visual system? - ANSWERSMacula



What is responsible for central vision? - ANSWERSMacula



What 2 types of diseases are related to the macula? - ANSWERSAge-related macula degeneration (AMD)

Diabetic macular edema (DME)



The point of exit of the ganglion cell axons and lies 15deg medial to fovea is where? - ANSWERSOptic disc



What is the spot on the retina called where photoreceptors are absent? - ANSWERSBlind spot



What is the field of vision? - ANSWERSThe degrees of visual angle during stable fixation of the eyes



How many degrees is the total visual field of both eyes? - ANSWERS200 degrees



How many degrees is the region of binocular overlap of the vision field? - ANSWERS120 degrees



The upper half of a person's body will enter which part of the retina? - ANSWERSLower retina



The lower half of a person's body will enter which part of the retina? - ANSWERSUpper retina



The temporal field of vision is projected to which part of the retina? - ANSWERSNasal part of retina

, The nasal field of vision is projected to which part of the retina? - ANSWERSTemporal part of retina



Describe the visual pathway - ANSWERSOptic N

Optic chiasm

Optic tract

LGN of thalamus

Optic radiations

Visual cortex



What carries information about temporal field of vision is crossed over? - ANSWERSOptic chiasm



What consists of ipsilateral nasal field and opposite side temporal field information? - ANSWERSOptic
tract



Where does the first synapse of the visual pathway occur? - ANSWERSLGN of thalamus



Which fibers pass through parietal lobe? - ANSWERSSuperior temporal radiations



Which fibers pass through the temporal lobe? - ANSWERSMayer's loop



The superior temporal radiations project to? - ANSWERSCuneus at Upper bank of calcarine fissure



Mayer's loop projects to? - ANSWERSLingula at Lower bank of calcarine fissure



Where is the primary visual cortex located? - ANSWERSon the banks of the calcarine fissure in occipital
lobe



A lesion that occurs at the upper bank causes? - ANSWERScontralateral inferior quadrant defects

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