30 Questions
What should be done with the fingers during the visual field testing procedure?
Illuminate them and place them midway between the patient and yourself
Why should the patient occlude their right eye during the testing procedure?
To evaluate the left eye
What is the purpose of fixating on the examiner's right eye during the testing procedure?
To monitor the patient's fixation
What type of visual field testing uses a curved instrument and automated targets?
Perimetry
What is the term for a visual field defect that affects half of the visual field?
Hemianopsia
What is the name of the instrument used in campimetry?
Tangent Screen
What is the term used to describe visual field defects that are the same size and shape in both eyes?
Congruous
What type of visual field defect is associated with ocular abnormalities?
Altitudinal defects
What is the term used to describe a general reduction in overall sensitivity of the visual field?
Depression
In what type of visual field defect is the corresponding visual fields of the two eyes affected?
Homonymous
What is the term used to describe a loss of ¼ of the visual field in one or both eyes?
Quadrantanopia
What type of visual field testing method provides the mean deviation from the normal population?
Automated VF
What is the primary purpose of performing Confrontation Visual Fields (CVF)?
To screen for Visual Field Defects (VFD) or to perform a more detailed VF evaluation
What equipment is used to perform Confrontation Visual Fields?
Occluder and Overhead Lamp
How should the patient be positioned during Confrontation Visual Fields?
Sitting at a distance of 60 to 80 cm from the examiner
Why should the examiner not use 3 fingers during Confrontation Visual Fields?
Because it can be easily confused with 2 or 4 fingers
What should the examiner do with their hand during Confrontation Visual Fields?
Keep the hand static and expose 1, 2 or 4 fingers
What is the purpose of the examiner's peripheral field during Confrontation Visual Fields?
To identify the limits of where to place the hand
What is a characteristic of a Homonymous Congruous Defect?
Affects the same half of the visual field in each eye
What is the main difference between Shallow or Relative Scotomas and Deep or Absolute Scotomas?
Response to different stimuli intensities
What is the name of the scotoma that affects half of the central visual field?
Hemianopic Scotoma
What is the characteristic of a Ceco-central Scotoma?
Affects a horizontal oval area between the point of fixation and the blind spot
What is the name of the scotoma that affects a circular area of depressed vision surrounding the point of fixation?
Annular Scotoma
What is the main difference between Peripheral Scotoma and Central Scotoma?
Location of the scotoma in the visual field
What type of visual field defect is typically seen in glaucoma?
Altitudinal defect respecting the vertical meridian
What is the result of a lesion to the proximal fibers of an optic nerve and the nasal fibers of the opposite eye?
Junctional scotoma
What type of visual field defect is seen in a lesion to the optic tract or optic radiations?
Homonymous hemianopsia
What is the term for a visual field defect that affects the upper or lower half of the visual field?
Altitudinal defect
What is the result of a lesion in the center of the chiasm?
Bitemporal hemianopsia
What type of visual field defect is seen in patients with strokes or traumatic brain injury?
Hemianopia or quadrantanopia
This quiz covers the equipment and set up for Confrontation Visual Fields, including occluder, overhead lamp, and dimly illuminated room. It also touches on Automated Perimetry for detailed VF evaluation.
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