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Doctor insights on: Tests For Protanopia

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I took ishihara plate test on internet and it shows that I have red color blind (protanopia). What can cause it, and what can be done about it?

I took ishihara plate test on internet and it shows that I have red color blind (protanopia). What can cause it, and what can be done about it?

Genetics: Color vision is controlled by a gene on the x-chromosome. Females xx and males xy, making males more likely to be color blind. Of the different types, red/green is the most common, with red being a sub-type of this. You should see an ophthalmologist for an evaluation. If you are just now discovering this, it seems like you are pretty well adapted to your situation. ...Read more

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Looking for protanopia help?

Looking for protanopia help?

No definitive cure…: But one site offered management suggestions:, certain types of tinted filters & contact lenses may help an individual better distinguish different colors. Optometrists can supply a singular red-tint contact lens to wear on the non-dominant eye. Software & cybernetic devices have been developed (eyeborg) a device that allows colorblind to hear sounds representing colors. Google eyeborg. ...Read more

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Is there a lens to correct protanopia color defect?

Caution: The use of a red contact lens or purple tinted glasses will allow you to distinguish the letters and numbers on test plates that you get wrong with the naked eye. However they work by shifting the axis of color deficiency so you become color blind in a new way and they cut down the overall light intensity which decreases acuity and contrast sensitivity. These are not cures. ...Read more

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Please let me know if there is a lens you can get to correct protanopia colour defect?

Please let me know if there is a lens you can get to correct protanopia colour defect?

No: There is a contact lens sold (x-chrom) which advertises that ability. What it actually does is shifts the axis of confusion to make you color blind in a different way - so that you can pass a standard color test like the ishihara. But it just trades one type of color deficiency for another and lowers the total light input as well. ...Read more

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Is there a remedy for protanopia?

Is there a remedy for protanopia?

No definitive cure…: But one site offered management suggestions:, certain types of tinted filters & contact lenses may help an individual better distinguish different colors. Optometrists can supply a singular red-tint contact lens to wear on the non-dominant eye. Software & cybernetic devices have been developed (eyeborg) a device that allows colorblind to hear sounds representing colors. Google eyeborg. ...Read more

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What is the difference between deuteranopia vs protanopia?

Dimmed bright colors: Protanopes lack long-wavelength-sensitive cones & are unable to distinguish between colors in the green–yellow–red part of the spectrum. Also the brightness of red, orange, & yellow is much reduced. Deuteranopes lack medium-wavelength cones; they have the same hue discrimination problems as the protanope, but without the abnormal dimming. Both have red-green colorblindness. ...Read more

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What is the difference between deuteranopia and protanopia?

What is the difference between deuteranopia and protanopia?

Color blindness: Deuteranopia is the more common type of color blindness with loss of green sensitivity--present in 1% of males and does not dim the vision. Protanopia is less common and is more severe with loss of red sensitivity and some dimming of vision. Both are X-chromosome linked. ...Read more

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What's deuteranopia and deuteranomaly, protanopia and protanomaly?

What's deuteranopia and deuteranomaly, protanopia and protanomaly?

Color defects: These are terms for inherited color deficiencies: deutero refers to red-green confusion and protan refers to yellow-blue confusion. Opias have absolute confusion and anomalies have partial confusion. ...Read more

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Please advise what is the difference between deuteranopia and deuteranomaly, protanopia and protanomaly?

Please advise what is the difference between deuteranopia and deuteranomaly, protanopia and protanomaly?

Complex: There are three colored light receptors. If one is substituted with the color of another that is termed "opia" and is the more extreme form. If the spectrum of one set is shifted but still picks up some of what it is supposed to receive that is "anomaly". These people can recognize more colors. "deutero" is red-green mix; "proto" is yellow blue mix. I call these deficiencies; not blindness. ...Read more