The LED vision chart unit is used for measuring the visual acuity and colour blindness of the human eye. The LED vision chart unit is a more efficient use of its innovative features. The LED vision chart unit is flexible, easy to use as compared with other products in the biomedical field. This LED vision chart unit is the important one and for trouble-free operation. Dot pattern(test): it is used to find out the fraction of eye symbol ‘o’. Colour pattern (test): it is consists of red. Green, yellow colour. It is used to find out the colour blindness of the human eye symbol. Duo-chrome (test): to find out the red & green colour with background of lettering. Finally, it is used to find out red & green colour. Snellen chart pattern (test): to find the visual acuity. The various sizes of letters are used in this chart. All language characteristics are used for the Snellen chart.