Ishihara Colour Vision Test Chart – Colour Blindness Testing Book

The Ishihara Colour Vision Test Chart is an ophthalmic diagnostic tool designed to screen for colour vision deficiencies, particularly red-green colour blindness. It uses specially designed pseudoisochromatic plates containing coloured dots arranged into numbers, patterns or tracing paths to assess colour perception. Available in different plate configurations, the chart provides a convenient method for routine colour vision screening. Suitable for ophthalmology clinics, optometry centres, eye hospitals, occupational health examinations and vision screening facilities. Key Features & Specifications - Product Type: Ishihara Colour Vision Test Chart - Testing Method: Pseudoisochromatic colour plate testing - Primary Function: Screening for red-green colour vision deficiencies - Test Plate Options: 14, 24 or 38 plates, depending on edition - Chart Format: Printed colour vision testing book - Plate Design: Multicoloured dot patterns containing numbers or tracing paths - Colour Deficiencies Assessed: Protan and deutan colour vision deficiencies - Testing Distance: Approximately 75 cm, according to common edition instructions - Illumination: Natural daylight or suitable daylight-equivalent lighting - Testing Time: Approximately 3 seconds per numeral plate - Patient Response: Identification of numbers or tracing of patterns - Scoring: Interpretation according to the specific edition's instructions - Power Requirement: None - Portability: Lightweight and portable - Reusability: Reusable printed chart - Storage: Keep closed and protected from direct sunlight to prevent fading - Application: Colour blindness screening and colour vision assessment - Intended Users: Ophthalmologists, optometrists and trained healthcare professionals - Suitable Facilities: Eye hospitals, optometry clinics, diagnostic centres and occupational health facilities