9 doctors weighed in:

I am red-green colorblind. How can I understand if I have deuteranomaly or protanomaly? Is it possible to have both? Is there a test for it?

9 doctors weighed in
Dr. Elden Rand
Internal Medicine - Cardiology
5 doctors agree

In brief: Yes

There is testing to figure out what to label your type of color deficit.
Here is a link to a site that talks about different types which may be helpful to you. http://colorvisiontesting.com/color2.htm.

In brief: Yes

There is testing to figure out what to label your type of color deficit.
Here is a link to a site that talks about different types which may be helpful to you. http://colorvisiontesting.com/color2.htm.
Dr. Elden Rand
Dr. Elden Rand
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Dr. Olivia Liao
Ophthalmology
2 doctors agree

In brief: The farnworth test

Your eye doctor can run the farnsworth 100 to determine the type of color vision anomaly, but usually this would not change your ability to function or your long range prognosis or outcomes.

In brief: The farnworth test

Your eye doctor can run the farnsworth 100 to determine the type of color vision anomaly, but usually this would not change your ability to function or your long range prognosis or outcomes.
Dr. Olivia Liao
Dr. Olivia Liao
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Dr. Bruce Saran
Ophthalmology
1 doctor agrees

In brief: Multiple ways

Red-blindness (protanopia) and red-weakness (protanomaly) and green-blindness (deuteranopia) or green-weak (deuteranomaly) are sorted out by your eye doctor with several tests: pseudoisochromatic plates (ishihara plates), anomaloscope; neitz-, nagel- or heidelberg multi-color-anomaloscope and the the farnsworth lantern and color arrangement test.

In brief: Multiple ways

Red-blindness (protanopia) and red-weakness (protanomaly) and green-blindness (deuteranopia) or green-weak (deuteranomaly) are sorted out by your eye doctor with several tests: pseudoisochromatic plates (ishihara plates), anomaloscope; neitz-, nagel- or heidelberg multi-color-anomaloscope and the the farnsworth lantern and color arrangement test.
Dr. Bruce Saran
Dr. Bruce Saran
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Dr. Richard Bensinger
Ophthalmology

In brief: Testing is available

These types can be distinguished by proper testing.
The most commonly used test, the Ishihara test, does not do this well. An older test, the HRR test is available in some offices to make this distinction. The 15 or 100 hue tests due this well. And there are laboratory test lanterns which can sort out all the subtle forms. You cannot have two forms of deficiency.

In brief: Testing is available

These types can be distinguished by proper testing.
The most commonly used test, the Ishihara test, does not do this well. An older test, the HRR test is available in some offices to make this distinction. The 15 or 100 hue tests due this well. And there are laboratory test lanterns which can sort out all the subtle forms. You cannot have two forms of deficiency.
Dr. Richard Bensinger
Dr. Richard Bensinger
Thank
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