Disclaimer: This test is not an official or real diagnosis of colour perception. I have just tried to show, how a LCD Martin Lantern may look like, based on the study conducted in 2009 by opthalmologists of the Indian Army & published by Armed Forces Medical Journal of India .Here, I want to clarify that I have never gone through Martin Lantern Test. Further,the images given on this blog are prepared by me(based on the data given in the journal & not by the researchers. Therefore, there may be errors.I have given details specific only for CP III vision but the study was not specifically for CP III colour vision.

IMPORTANT: Please don't fall in the traps of quacks claiming that they will treat your colour vision defect. Colour vision defects cannot be reverted as of now. Those are just some tricks to pass Ishihara Test but military personnels can see through these tricks in a few seconds. So, please don't waste your money and time in such adventures.Also, some people have copied material from this blog and have reproduced the same in wrong form without taking care of resolution and other technical details. So, please beware !!

In India,CP III colour vision is judged by Martin Lantern Test.Since,these lamps are out of production since 1940,the Armed Forces Medical Services conducted a study in which they tried to bring the lamp test on computer display(You can read the whole article at Armed Forces Medical Journal of India ).Since,the displays are made up of primary colours itself & different displays have different colour profiles.Thus,for realistic & uniform colour production,the computer LCDs were needed to be calibrated as given in step 1.

NewTwo new Farnsworth Lantern videos have been added. Watch those here.

Must read Advice to Colourblind Defence Aspirants.

Now,for testing you are needed to follow these steps.

1. Calibrate your LCD as given below.                      

                    Screen Resolution -   preferred 1366 × 768   or  maximum
                    Brightness              -   Minimum
                    Contrast                  -  Maximum

2. Download the 'images.zip' file from any one of the links given below.(I myself have prepared these images,thus these cannot be considered error free).
Update 01: Well, I think the diameter of the colour dots in the images should be lesser than that at present. I will try to update the images when i get time, till then you can increase the distance from 1.5 metres to compensate the effect. When the image is updated, this notice will be removed.

Download from Google Drive.   

If link is broken, please let me know in comments.

3. Darken your room & optionally you may dark adapt yourself.

4. Sit 1.5 metres away from your LCD.

5. Now play the slideshow in full screen at 100% zoom & try to identify the  colours.

Conclusion :If everything, including the images prepared by me doesn't have any error  then a person with CP III (or higher) colour vision should be able to identify them all  correctly. You may ask someone to sit near LCD to  take a note of your errors.

Thank You. Any correction or advice is invited in comments.