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Visual acuity: Quiz


Question 1: Visual acuity (VA) is acuteness or clearness of vision, especially form vision, which is dependent on the sharpness of the retinal focus within the ________ and the sensitivity of the interpretative faculty of the brain.
Nervous systemLungSensory systemEye

Question 2: The ________’s visual acuity is approximately 20/400, developing to 20/20 well after age 6 in most children, according to a study published by U.S.C.
PregnancyPrenatal developmentAttachment theoryInfant

Question 3: This is certainly not the case, however, and furthermore the pupil can cause ________ of the light.

Question 4: Because the limit of vernier acuity is well below that imposed on regular visual acuity by the "retinal grain" or size of the foveal cones, it is thought to be a process of the ________ rather than the retina.
Visual cortexDorsomedial areaCuneusFrontal eye fields

Question 5: A potentially serious problem with this technique is that the process is reflexive and mediated in the low-level ________, not in the visual cortex.
White matterHuman brainBrainstemGrey matter

Question 6: Place the chart at 20 feet (or 6 meters) and illuminate to 480 ________ at that distance.
Lumen (unit)HertzLuxJoule

Question 7: Some people may suffer from other visual problems, such as ________, reduced contrast, or inability to track fast-moving objects and still have normal visual acuity.
Retinitis pigmentosaMonochromacyAchromatopsiaColor blindness

Question 8: The 20/x number does not directly relate to the eyeglass prescription required to correct vision; rather an ________ seeks to find the prescription that will provide at least 20/20 vision.
Weber testRinne testEye examinationNeurological examination

Question 9: A person's visual acuity is registered documenting the following: whether the test was for distant or near vision, the eye(s) evaluated and whether ________ (i.e.
Eyeglass prescriptionCorrective lensMyopiaGlasses

Question 10: In some countries, acuity is expressed as a ________, and in some as a decimal number.
Fraction (mathematics)Jamshīd al-KāshīDivision (mathematics)Irrational number


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