Ishihara's Tests for Colour Deficiency (24 Plates)

The Isihara plates represent the most widely used colour vision deficiency test, still utilised by most optometrists and ophthalmologists around the world.

Application:

This robust, high-quality 24-plate book includes the following plate types, quality printed for correct contrast and colour balance:

• Vanishing design: Only people with good colour vision can see the sign; colour blind individuals will not be able to see it.

• Transformation design: Colour blind people will see a different sign.

• Hidden digit design: Only colour blind people will be able to spot the sign.

• Classification design: This is used to differentiate between red- and green-blindness. The vanishing design is used on either side of the plate -- one side for deutan defects and the other for protans.