WorksheetsColor Vision & Contrast Sensitivity Assessment Instrument
Total questions: 25
Worksheet time: 13mins
A person who can differentiate all colors and involves all three cones, but not necessarily functioning perfectly, is classified as a:
Dichromat
Monochromat
Anomalous trichromat
Achromat
Which type of dichromatism is characterized by blindness to red color due to the absence of Phorphyropsin pigment?
Deuteranopia
Tritanopia
Protanopia
Monochromatism
A person with Monochromatism can typically see:
All colors with reduced sensitivity.
Only red and green colors.
Black, white, and shades of grey.
Only blue and yellow colors.
Which type of anomalous trichromatism is described as a weakness to green color and is common (6%) and sex-linked?
Protanomalous
Deuteranomalous
Tritanomalous
Monochromat
Which of the following is an indication for performing a color vision test?
Unexplained reduction in visual acuity.
Normal visual acuity of 20/20.
Absence of any systemic or ocular disease.
History of normal color perception.
Which category of color vision tests includes the Ishihara Plates and AO-HRR Plates?
Hue discrimination/Arrangement tests
Anomaloscopes
Pseudoisochromatic Test Plates
Color naming and sorting tests
What is the recommended illumination for color vision testing using Ishihara plates?
Dim room light
500-600 lux or daylight illumination
Fluorescent light only
Red-free illumination
In the Ishihara test, what is the maximum recommended time to answer numerals?
1 second
3 seconds
5 seconds
10 seconds
Which type of Ishihara plate is seen by a color normal subject but cannot be seen by a color deficient subject?
Transformation plate
Vanishing plate
Hidden-digit plate
Diagnostic plate
In the Ishihara test, a "Hidden-digit plate" is designed so that:
A normal person sees a figure, but a CVD does not.
A normal person does not see a figure, while a CVD will see it.
Both normal and CVD subjects see the same figure.
The figure appears different to normal and CVD subjects.
For the 38-plate edition of the Ishihara test, how many errors indicate a normal color vision?
8 or more
6 or more
4 or less
2 or less
The Dvorine Pseudoisochromatic Plates is most similar to the
Ishihara test
100 hue test
D15 test
City University test
The Dvorine Pseudoisochromatic Plates are widely used for screening which types of color vision defects?
Tritan defects
Monochromatism
Protan and Deutan defects
Anomalous trichromatism only
The American Optic Hardy Rand Ritter (AO HRR) plates are ideal for pediatric testing of congenital color blindness and contain:
Only Arabic numerals.
Geometric shapes (circle, cross, and triangle).
Only wandering trails.
Only red and green dots.
The City University Colour Vision Test identifies:
All types of color deficiencies, including mild ones.
Severe and mild deutan color defects better than protan defects.
Only tritan defects.
Only protan defects.
Which of the following tests is an example of a Hue Discrimination/Arrangement Test?
Ishihara Plates
Nagel Anomaloscope
The Farnsworth-Munsell 100 Hue test
Lantern tests
The Farnsworth-Munsell 100 Hue test consists of how many movable color samples arranged in four boxes?
15
22
85
100
The Farnsworth-Munsell D-15 Hue Test is an abridged version primarily intended for:
Detailed quantitative analysis of severity.
Screening color vision defects only.
Diagnosing specific types of anomalous trichromatism.
Occupational testing for signal light identification.
Which instrument is considered the "GOLD STANDARD" and most accurate for the diagnosis of color vision defects, despite requiring examiner skill?
Ishihara Test
Farnsworth-Munsell D-15
Nagel Anomaloscope
Lantern Test
In the Nagel Anomaloscope test, the observer is asked to mix red and green colors to match which color disc?
Blue
Yellow
White
Purple
What is "Contrast Threshold" defined as?
The ability to perceive sharp outlines of small objects.
The degree of blackness to whiteness of a target.
The reciprocal of contrast sensitivity.
The smallest amount of contrast required to be able to see the target.
Which of the following is a variable in the measurement of contrast sensitivity?
The patient's age.
The color of the target.
The distance between the grating periods of cycles per degree of visual angle.
The patient's refractive error.
Which contrast sensitivity test uses letters of the same size but with reducing contrast, organized into two triplets per row?
FACT charts
Bailey Lovie chart
Pelli Robson Test
ETDRS Low Contrast Sloan Letter
The ETDRS Low Contrast Sloan Letter chart is available in how many contrast levels?
2
3
4
5
The Functional Acuity Contrast Testing (F.A.C.T) chart comprises sine-wave gratings of varying frequencies and tests how many spatial frequencies and levels of contrast?
Three spatial frequencies and five levels of contrast.
Five spatial frequencies and nine levels of contrast.
Nine spatial frequencies and five levels of contrast.
Ten spatial frequencies and ten levels of contrast.
