Variation in colour perception among normal individuals- A survey

Ishihara test consist of coloured plates it consist of circle of dots appearing in different size and different colour. Within the pattern are dots which form a number or shape clearly visible to those with normal color vision, and invisible, or difficult to see, to those with a red-green color vision defect. Other plates reaveal number only to those with a red/ green colour deficiency and be invisible to those with normal red green colour vision and normal test consist of 38 plates. study is mainly intended to evaluate the colour perception among normal individuals This was mainly intended to determine the variation in colour perception among normal individuals.