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ABO (NOCE) Practice

Q&A Chapter 1 Anatomy & Physiology

QuestionAnswer
What is the approximate speed of light? 186,000 miles per second
What is the exact speed of light? 186, 282 miles per second
What layer makes up 90% of the Cornea? The Stroma
About how thick is the Cornea at it's center? 0.5 mm
About how many Cones does each Retina Contain 6 million
About how many Rods does each Retina contain? 120 million
What is the index of refraction for the Cornea? 1.37
What is the index of refraction for the Crystalline Lens? 1.42
What 3 layers comprise the Fibrous Tunic (Outer Layer) The Sclera, Cornea, and Limbus
What 3 layers Comprise of the Vascular Tunic (Middle Layer) The Iris, Ciliary body, and the Choroid
What does the Neural Layer consist of? (Inner Layer) The Retina
What is Diplopia? Double Vision
How many muscles move each eye? 6 muscles
What is the term for a functional eye that for some reason becomes a non-seeing eye? Amblyopia
A tendency of the eye deviating inwards Esophoria
When the eye is always inward Esotropia
When the diopter powers are greater than 2.00 diopters between the left and right eye Anisometropia
When the powers in one eye are opposite of the other (I.E. OD = -2.00 OS =+1.00) Antimetropia
The term for Nearsighted Myopia
The term for Farsighted Hyperopia
When both points of light come to focus behind the retina Compound Hyperopic Astigmatism
When one point of light comes to focus on the retina and the other point of light comes to focus in front of the retina Simple Myopic Astigmatism
When both points of light come to focus in front of the retina Compound Myopic Astigmatism
When one point of light comes to focus on the retina and the other point of light comes to focus behind the retina Simple Hyperopic Astigmatism
What does Konia mean? Image
What does Iseikonia mean? Same size images
What is the term for when the eyes focus inward to read? Convergence
What chart is used to evaluate visual acuity at 20 feet or ocular infinity? The Snellan Chart
What is the term for an eye without a crystalline lens or an eye with a crystalline lens that is unusable? Aphakia
What is the name of the chart that checks for near visual acuity? Referred to as the J4 or J2 chart The Jaeger Chart
The device to measure intraocular pressure Tonometer
What is the Ishihara test? Testing Color
What device is used to see the interior of the eye? Ophthalmoscope
What device is used for visual acuity refinement by a series of trial lenses The Phoropter
What is the term for having two differently colored eyes (irises) Heterochromia
If a person has 20/200 or worse for vision, they are considered... Legally Blind
What does NLP stand for? No Light Perception
The refractive power of the average cornea is equal to about ______ diopters. 43.00
The refractive power of the average crystalline lens is about ______ diopters. 17.00
The _______ provides nutrients to the retina and other parts of the eye. Choroid
The ______ provides protection and helps maintain the eye's shape. Sclera
The ____ regulates the amount of light entering the eye by changing the size of the pupil. Iris
The _____ _____ carries impulses from the retina to the brain. Optic Nerve
What are the three spaces (or chambers) of the eye? The Anterior chamber, Posterior Chamber and Vitreous Chamber (or Cavity)
The Cornea consists of ____ distinct layers. Five
What is the first layer of the Cornea? The Epithelium
What is the second layer of the Cornea? Bowman's Membrane
What is the third layer of the Cornea? The Stroma
What is the fourth layer of the Cornea? Descemet's Membrane
What is the fifth layer of the Cornea? The Endothelium
The optic nerve takes a route that includes a crossover area known as the _____ _______ Optic Chiasma
The adjustment of the Crystalline Lens is called _____________ Accomodation
The transparent lens located behind the iris and the pupil is called... The Crystalline Lens
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