The Ishihara Color Test. Color perception test for red-green color deficiencies. Ishihara Plate No. 4.
The Ishihara Color Test. Color perception test for red-green color deficiencies. Ishihara Plate No. 1.
The Ishihara Color Test. Color perception test for red-green color deficiencies. Ishihara Plate No. 1.
The Ishihara Color Test. Color perception test for red-green color deficiencies. Ishihara Plate No. 3.
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
These goggles with replacement glass filters of various colours are for testing colour vision. Most colour blindness is inherited, and affects more...
Featured is the ChromaGen haploscopic contact lens system for improving defective colour vision. Contained within the set is a booklet by D A Harris...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Most colour blindness is inherited, and affects more men than women. Colour blindness usually involves confusion between red, green and yellow. Dr...
Detail. This booklet of threads was used by John Dalton to test his own colour blindness. It was given to him by the astronomer Sir John Frederick...
This booklet of threads was used by John Dalton to test his own colour blindness. It was given to him by the astronomer Sir John Frederick William...
This booklet of threads was used by John Dalton to test his own colour blindness. It was given to him by the astronomer Sir John Frederick William...
This booklet of threads was used by John Dalton to test his own colour blindness. It was given to him by the astronomer Sir John Frederick William...