FARNSWORTH
D-15 Colour Vision Test
Provide professional assessment for colour vision deficiency and colour blindness.
Use the Farnsworth D-15 Colour Vision Test.
Detects both red–green and blue–yellow colour vision deficiencies.
How Are Colour Vision Deficiencies Diagnosed?
When assessing colour vision deficiency or colour blindness, our optometrists typically use the following two diagnostic tests:
Ishihara Colour Vision Test
The Ishihara Test is a widely used screening tool for detecting red–green colour vision deficiency. It consists of multiple plates made up of coloured dots forming hidden numbers or patterns.
Farnsworth D-15
The Farnsworth D-15 Colour Vision Test assesses both red–green and blue–yellow deficiencies. The test evaluates a person’s ability to arrange colours in correct hue order using 15 colour caps, helping to identify the type and severity of colour vision impairment.
Standardised Colour Vision Testing Light Source
Our clinic uses a daylight-simulating illumination system to ensure accurate and reliable colour assessment results.
Management and Support for Colour Vision Deficiency
Currently, colour blindness and colour vision deficiency cannot be cured, but certain aids may help improve colour discrimination in daily life.
EnChroma® Colour Vision Glasses
- Use special optical filtering technology to enhance colour contrast.
- Help individuals with red–green colour deficiency improve their colour perception experience.
- Limited effectiveness for other types of colour vision deficiency — suitability testing is recommended before use.
X-Chrome Colour Vision Contact Lenses
- A special contact lens with a red-tinted centre, worn on the non-dominant eye.
- Can improve colour discrimination, but is not a treatment for colour vision deficiency.
- Effect varies by individual; should be used under professional guidance and with regular check-ups to prevent eye complications.
