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2012 Series -  January 10, 2012 Lecture 51 of 52  NEXT»

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QOW46

A seven-year-old boy is presented for examination because his teacher noted that he was having difficulty recognizing some colors during a school exercise in art class. Examination of the eyes was completely normal including 20/20 vision in each eye, refractive error of + 0.50 in each eye, and normal stereopsis. Testing for color vision with the Ishihara test demonstrated failure to recognize the numbers in several circles indicating red / green color “blindness”.

1. This condition can be characterized as follows:

a. occurs in 6 to 8% of white males
b. is often progressive leading to decreased visual acuity
c. is transmitted as an autosomal dominant
d. rarely limits occupational choices
e. none of the above

2. Terms used to describe color blindness include:

a. dyschromatopsia
b. deuteranopia
c. protanopia
d. achromatopsia
e. all of the above

3. A male with red / green color blindness could be counseled as follows:
a. There will be no limitation regarding occupation because of this condition.
b. This condition should be considered when choosing an occupation.
c. It is likely that you will pass this condition on to your children.
d. Your color vision will be more nearly normal in dim light.
e. none of the above

For answers to the above, click here on or after January 17, 2012.

 

 


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