This CVD screening tool proves to be the most effective tool ever in community eye care, school vision screening and for eye care practitioners. A team of dedicated Optometrists and vision researchers have put their enormous effort to bring ‘Dalton’s pseudo isochromatic plates(PIP)’ for screening CVD in an effective manner. We at colourvision.org.in believe that ‘Dalton’s PIP’ will simplify the process of screening CVD among school children in an eminent way!

Drawbacks of existing pseudo – isochromatic plates :

-Same pattern existing for over many years, many CVD candidates entering into the selection process in many careers just memorize the set pattern and play a ‘foul’ game risking their entire career. And to the surprise, this ‘foul’ practice is unnoticed by many selection committee members.

-The same ‘memorization of set patterns’ happens in community activities such as school vision screening.

-To add another surprise, there are many unethical firms who make people memorize the existing PIP patterns and make money out of it.

-The material of the booklet cannot withstand massive wear and tear which usually happens in community screening.

-The print on the material doesn’t last long, loses its property with time.

-As the test material is expensive, many clinicians across the nation do not replace the booklet even after certain degradation in print and the material, thus making the test worthless.

-Many duplicate versions of Ishihara is available in the ophthalmic market whereas using such things is never reliable (i.e. People who are CVD could read the pattern inside which shouldn’t be possible)
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