I think this test may be helpful as a simple test for villagers' sight. http://www.flixster.com/user/efrayaacov/quiz/color-blindness-test-efra-made Please feel free to take the test and determine if you need further consultation. It may be quite tasking but remember that the eyes are the light of the body. It is good to take good care of our eyes, if possible have an annual sight test. It is also good to ensure that our children have sight tests periodically as this is necessitated by the increased UV light from the sun, increased exposure to computers and televisions among other factors. I hope opticians in the house can shed more light on this as well us give simple eyecare tips.