Global Color Blind Test Market Growth (Status and Outlook) 2025-2031

September 2025 | 83 pages | ID: GF6E5F3FBC3EN
LP Information

Abstracts

According to this study, the global Color Blind Test market size will reach US$ million by 2031.

Color blindness results from the light-sensitive pigments in the cones of the retina receiving the wrong genetic coding for wavelengths of light. Complete color blindness is actually very rare. It is far more common for individuals to be able to see some colors, to a certain extent, but not as clearly as those without any form of color blindness.Color blindness testing may be a part of your eye exam at Deerwood Family Eyecare. The Igaku-Shoin Color Test for detecting colorblindness is used to detect red/green color deficiencies. Additional tests, designed to detect additional forms of colorblindness, may also be administered.

United States market for Color Blind Test is estimated to increase from US$ million in 2024 to US$ million by 2031, at a CAGR of % from 2025 through 2031.

China market for Color Blind Test is estimated to increase from US$ million in 2024 to US$ million by 2031, at a CAGR of % from 2025 through 2031.

Europe market for Color Blind Test is estimated to increase from US$ million in 2024 to US$ million by 2031, at a CAGR of % from 2025 through 2031.

Global key Color Blind Test players cover Eyeque, Deerwood Eyecare, EnChroma, Stanton Optical, Blair Vison Care, etc. In terms of revenue, the global two largest companies occupied for a share nearly % in 2024.

LPI (LP Information)' newest research report, the “Color Blind Test Industry Forecast” looks at past sales and reviews total world Color Blind Test sales in 2024, providing a comprehensive analysis by region and market sector of projected Color Blind Test sales for 2025 through 2031. With Color Blind Test sales broken down by region, market sector and sub-sector, this report provides a detailed analysis in US$ millions of the world Color Blind Test industry.

This Insight Report provides a comprehensive analysis of the global Color Blind Test landscape and highlights key trends related to product segmentation, company formation, revenue, and market share, latest development, and M&A activity. This report also analyses the strategies of leading global companies with a focus on Color Blind Test portfolios and capabilities, market entry strategies, market positions, and geographic footprints, to better understand these firms’ unique position in an accelerating global Color Blind Test market.

This Insight Report evaluates the key market trends, drivers, and affecting factors shaping the global outlook for Color Blind Test and breaks down the forecast by Type, by Application, geography, and market size to highlight emerging pockets of opportunity. With a transparent methodology based on hundreds of bottom-up qualitative and quantitative market inputs, this study forecast offers a highly nuanced view of the current state and future trajectory in the global Color Blind Test.

This report presents a comprehensive overview, market shares, and growth opportunities of Color Blind Test market by product type, application, key players and key regions and countries.

Segmentation by Type:

• Screening Color Blindness Test
• Quantitative Color Blindness Test

Segmentation by Application:

• School
• Hospital
• Family
• Other

This report also splits the market by region:

• Americas
• United States
• Canada
• Mexico
• Brazil
• APAC
• China
• Japan
• Korea
• Southeast Asia
• India
• Australia
• Europe
• Germany
• France
• UK
• Italy
• Russia
• Middle East & Africa
• Egypt
• South Africa
• Israel
• Turkey
• GCC Countries

The below companies that are profiled have been selected based on inputs gathered from primary experts and analyzing the company's coverage, product portfolio, its market penetration.

• Eyeque
• Deerwood Eyecare
• EnChroma
• Stanton Optical
• Blair Vison Care
• Richmond Eye Associates
• iristech

Contents

1 SCOPE OF THE REPORT

1.1 Market Introduction
1.2 Years Considered
1.3 Research Objectives
1.4 Market Research Methodology
1.5 Research Process and Data Source
1.6 Economic Indicators
1.7 Currency Considered
1.8 Market Estimation Caveats

2 EXECUTIVE SUMMARY

2.1 World Market Overview
  2.1.1 Global Color Blind Test Market Size (2020-2031)
  2.1.2 Color Blind Test Market Size CAGR by Region (2020 VS 2024 VS 2031)
  2.1.3 World Current & Future Analysis for Color Blind Test by Country/Region (2020, 2024 & 2031)
2.2 Color Blind Test Segment by Type
  2.2.1 Screening Color Blindness Test
  2.2.2 Quantitative Color Blindness Test
2.3 Color Blind Test Market Size by Type
  2.3.1 Color Blind Test Market Size CAGR by Type (2020 VS 2024 VS 2031)
  2.3.2 Global Color Blind Test Market Size Market Share by Type (2020-2025)
2.4 Color Blind Test Segment by Application
  2.4.1 School
  2.4.2 Hospital
  2.4.3 Family
  2.4.4 Other
2.5 Color Blind Test Market Size by Application
  2.5.1 Color Blind Test Market Size CAGR by Application (2020 VS 2024 VS 2031)
  2.5.2 Global Color Blind Test Market Size Market Share by Application (2020-2025)

3 COLOR BLIND TEST MARKET SIZE BY PLAYER

3.1 Color Blind Test Market Size Market Share by Player
  3.1.1 Global Color Blind Test Revenue by Player (2020-2025)
  3.1.2 Global Color Blind Test Revenue Market Share by Player (2020-2025)
3.2 Global Color Blind Test Key Players Head office and Products Offered
3.3 Market Concentration Rate Analysis
  3.3.1 Competition Landscape Analysis
  3.3.2 Concentration Ratio (CR3, CR5 and CR10) & (2023-2025)
3.4 New Products and Potential Entrants
3.5 Mergers & Acquisitions, Expansion

4 COLOR BLIND TEST BY REGION

4.1 Color Blind Test Market Size by Region (2020-2025)
4.2 Global Color Blind Test Annual Revenue by Country/Region (2020-2025)
4.3 Americas Color Blind Test Market Size Growth (2020-2025)
4.4 APAC Color Blind Test Market Size Growth (2020-2025)
4.5 Europe Color Blind Test Market Size Growth (2020-2025)
4.6 Middle East & Africa Color Blind Test Market Size Growth (2020-2025)

5 AMERICAS

5.1 Americas Color Blind Test Market Size by Country (2020-2025)
5.2 Americas Color Blind Test Market Size by Type (2020-2025)
5.3 Americas Color Blind Test Market Size by Application (2020-2025)
5.4 United States
5.5 Canada
5.6 Mexico
5.7 Brazil

6 APAC

6.1 APAC Color Blind Test Market Size by Region (2020-2025)
6.2 APAC Color Blind Test Market Size by Type (2020-2025)
6.3 APAC Color Blind Test Market Size by Application (2020-2025)
6.4 China
6.5 Japan
6.6 South Korea
6.7 Southeast Asia
6.8 India
6.9 Australia

7 EUROPE

7.1 Europe Color Blind Test Market Size by Country (2020-2025)
7.2 Europe Color Blind Test Market Size by Type (2020-2025)
7.3 Europe Color Blind Test Market Size by Application (2020-2025)
7.4 Germany
7.5 France
7.6 UK
7.7 Italy
7.8 Russia

8 MIDDLE EAST & AFRICA

8.1 Middle East & Africa Color Blind Test by Region (2020-2025)
8.2 Middle East & Africa Color Blind Test Market Size by Type (2020-2025)
8.3 Middle East & Africa Color Blind Test Market Size by Application (2020-2025)
8.4 Egypt
8.5 South Africa
8.6 Israel
8.7 Turkey
8.8 GCC Countries

9 MARKET DRIVERS, CHALLENGES AND TRENDS

9.1 Market Drivers & Growth Opportunities
9.2 Market Challenges & Risks
9.3 Industry Trends

10 GLOBAL COLOR BLIND TEST MARKET FORECAST

10.1 Global Color Blind Test Forecast by Region (2026-2031)
  10.1.1 Global Color Blind Test Forecast by Region (2026-2031)
  10.1.2 Americas Color Blind Test Forecast
  10.1.3 APAC Color Blind Test Forecast
  10.1.4 Europe Color Blind Test Forecast
  10.1.5 Middle East & Africa Color Blind Test Forecast
10.2 Americas Color Blind Test Forecast by Country (2026-2031)
  10.2.1 United States Market Color Blind Test Forecast
  10.2.2 Canada Market Color Blind Test Forecast
  10.2.3 Mexico Market Color Blind Test Forecast
  10.2.4 Brazil Market Color Blind Test Forecast
10.3 APAC Color Blind Test Forecast by Region (2026-2031)
  10.3.1 China Color Blind Test Market Forecast
  10.3.2 Japan Market Color Blind Test Forecast
  10.3.3 Korea Market Color Blind Test Forecast
  10.3.4 Southeast Asia Market Color Blind Test Forecast
  10.3.5 India Market Color Blind Test Forecast
  10.3.6 Australia Market Color Blind Test Forecast
10.4 Europe Color Blind Test Forecast by Country (2026-2031)
  10.4.1 Germany Market Color Blind Test Forecast
  10.4.2 France Market Color Blind Test Forecast
  10.4.3 UK Market Color Blind Test Forecast
  10.4.4 Italy Market Color Blind Test Forecast
  10.4.5 Russia Market Color Blind Test Forecast
10.5 Middle East & Africa Color Blind Test Forecast by Region (2026-2031)
  10.5.1 Egypt Market Color Blind Test Forecast
  10.5.2 South Africa Market Color Blind Test Forecast
  10.5.3 Israel Market Color Blind Test Forecast
  10.5.4 Turkey Market Color Blind Test Forecast
10.6 Global Color Blind Test Forecast by Type (2026-2031)
10.7 Global Color Blind Test Forecast by Application (2026-2031)
  10.7.1 GCC Countries Market Color Blind Test Forecast

11 KEY PLAYERS ANALYSIS

11.1 Eyeque
  11.1.1 Eyeque Company Information
  11.1.2 Eyeque Color Blind Test Product Offered
  11.1.3 Eyeque Color Blind Test Revenue, Gross Margin and Market Share (2020-2025)
  11.1.4 Eyeque Main Business Overview
  11.1.5 Eyeque Latest Developments
11.2 Deerwood Eyecare
  11.2.1 Deerwood Eyecare Company Information
  11.2.2 Deerwood Eyecare Color Blind Test Product Offered
  11.2.3 Deerwood Eyecare Color Blind Test Revenue, Gross Margin and Market Share (2020-2025)
  11.2.4 Deerwood Eyecare Main Business Overview
  11.2.5 Deerwood Eyecare Latest Developments
11.3 EnChroma
  11.3.1 EnChroma Company Information
  11.3.2 EnChroma Color Blind Test Product Offered
  11.3.3 EnChroma Color Blind Test Revenue, Gross Margin and Market Share (2020-2025)
  11.3.4 EnChroma Main Business Overview
  11.3.5 EnChroma Latest Developments
11.4 Stanton Optical
  11.4.1 Stanton Optical Company Information
  11.4.2 Stanton Optical Color Blind Test Product Offered
  11.4.3 Stanton Optical Color Blind Test Revenue, Gross Margin and Market Share (2020-2025)
  11.4.4 Stanton Optical Main Business Overview
  11.4.5 Stanton Optical Latest Developments
11.5 Blair Vison Care
  11.5.1 Blair Vison Care Company Information
  11.5.2 Blair Vison Care Color Blind Test Product Offered
  11.5.3 Blair Vison Care Color Blind Test Revenue, Gross Margin and Market Share (2020-2025)
  11.5.4 Blair Vison Care Main Business Overview
  11.5.5 Blair Vison Care Latest Developments
11.6 Richmond Eye Associates
  11.6.1 Richmond Eye Associates Company Information
  11.6.2 Richmond Eye Associates Color Blind Test Product Offered
  11.6.3 Richmond Eye Associates Color Blind Test Revenue, Gross Margin and Market Share (2020-2025)
  11.6.4 Richmond Eye Associates Main Business Overview
  11.6.5 Richmond Eye Associates Latest Developments
11.7 iristech
  11.7.1 iristech Company Information
  11.7.2 iristech Color Blind Test Product Offered
  11.7.3 iristech Color Blind Test Revenue, Gross Margin and Market Share (2020-2025)
  11.7.4 iristech Main Business Overview
  11.7.5 iristech Latest Developments

12 RESEARCH FINDINGS AND CONCLUSION

List Of Tables

LIST OF TABLES

Table 1. Color Blind Test Market Size CAGR by Region (2020 VS 2024 VS 2031) & ($ millions)
Table 2. Color Blind Test Annual Sales CAGR by Country/Region (2020, 2024 & 2031) & ($ millions)
Table 3. Major Players of Screening Color Blindness Test
Table 4. Major Players of Quantitative Color Blindness Test
Table 5. Color Blind Test Market Size CAGR by Type (2020 VS 2024 VS 2031) & ($ millions)
Table 6. Global Color Blind Test Market Size by Type (2020-2025) & ($ millions)
Table 7. Global Color Blind Test Market Size Market Share by Type (2020-2025)
Table 8. Color Blind Test Market Size CAGR by Application (2020 VS 2024 VS 2031) & ($ millions)
Table 9. Global Color Blind Test Market Size by Application (2020-2025) & ($ millions)
Table 10. Global Color Blind Test Market Size Market Share by Application (2020-2025)
Table 11. Global Color Blind Test Revenue by Player (2020-2025) & ($ millions)
Table 12. Global Color Blind Test Revenue Market Share by Player (2020-2025)
Table 13. Color Blind Test Key Players Head office and Products Offered
Table 14. Color Blind Test Concentration Ratio (CR3, CR5 and CR10) & (2023-2025)
Table 15. New Products and Potential Entrants
Table 16. Mergers & Acquisitions, Expansion
Table 17. Global Color Blind Test Market Size by Region (2020-2025) & ($ millions)
Table 18. Global Color Blind Test Market Size Market Share by Region (2020-2025)
Table 19. Global Color Blind Test Revenue by Country/Region (2020-2025) & ($ millions)
Table 20. Global Color Blind Test Revenue Market Share by Country/Region (2020-2025)
Table 21. Americas Color Blind Test Market Size by Country (2020-2025) & ($ millions)
Table 22. Americas Color Blind Test Market Size Market Share by Country (2020-2025)
Table 23. Americas Color Blind Test Market Size by Type (2020-2025) & ($ millions)
Table 24. Americas Color Blind Test Market Size Market Share by Type (2020-2025)
Table 25. Americas Color Blind Test Market Size by Application (2020-2025) & ($ millions)
Table 26. Americas Color Blind Test Market Size Market Share by Application (2020-2025)
Table 27. APAC Color Blind Test Market Size by Region (2020-2025) & ($ millions)
Table 28. APAC Color Blind Test Market Size Market Share by Region (2020-2025)
Table 29. APAC Color Blind Test Market Size by Type (2020-2025) & ($ millions)
Table 30. APAC Color Blind Test Market Size by Application (2020-2025) & ($ millions)
Table 31. Europe Color Blind Test Market Size by Country (2020-2025) & ($ millions)
Table 32. Europe Color Blind Test Market Size Market Share by Country (2020-2025)
Table 33. Europe Color Blind Test Market Size by Type (2020-2025) & ($ millions)
Table 34. Europe Color Blind Test Market Size by Application (2020-2025) & ($ millions)
Table 35. Middle East & Africa Color Blind Test Market Size by Region (2020-2025) & ($ millions)
Table 36. Middle East & Africa Color Blind Test Market Size by Type (2020-2025) & ($ millions)
Table 37. Middle East & Africa Color Blind Test Market Size by Application (2020-2025) & ($ millions)
Table 38. Key Market Drivers & Growth Opportunities of Color Blind Test
Table 39. Key Market Challenges & Risks of Color Blind Test
Table 40. Key Industry Trends of Color Blind Test
Table 41. Global Color Blind Test Market Size Forecast by Region (2026-2031) & ($ millions)
Table 42. Global Color Blind Test Market Size Market Share Forecast by Region (2026-2031)
Table 43. Global Color Blind Test Market Size Forecast by Type (2026-2031) & ($ millions)
Table 44. Global Color Blind Test Market Size Forecast by Application (2026-2031) & ($ millions)
Table 45. Eyeque Details, Company Type, Color Blind Test Area Served and Its Competitors
Table 46. Eyeque Color Blind Test Product Offered
Table 47. Eyeque Color Blind Test Revenue ($ million), Gross Margin and Market Share (2020-2025)
Table 48. Eyeque Main Business
Table 49. Eyeque Latest Developments
Table 50. Deerwood Eyecare Details, Company Type, Color Blind Test Area Served and Its Competitors
Table 51. Deerwood Eyecare Color Blind Test Product Offered
Table 52. Deerwood Eyecare Color Blind Test Revenue ($ million), Gross Margin and Market Share (2020-2025)
Table 53. Deerwood Eyecare Main Business
Table 54. Deerwood Eyecare Latest Developments
Table 55. EnChroma Details, Company Type, Color Blind Test Area Served and Its Competitors
Table 56. EnChroma Color Blind Test Product Offered
Table 57. EnChroma Color Blind Test Revenue ($ million), Gross Margin and Market Share (2020-2025)
Table 58. EnChroma Main Business
Table 59. EnChroma Latest Developments
Table 60. Stanton Optical Details, Company Type, Color Blind Test Area Served and Its Competitors
Table 61. Stanton Optical Color Blind Test Product Offered
Table 62. Stanton Optical Color Blind Test Revenue ($ million), Gross Margin and Market Share (2020-2025)
Table 63. Stanton Optical Main Business
Table 64. Stanton Optical Latest Developments
Table 65. Blair Vison Care Details, Company Type, Color Blind Test Area Served and Its Competitors
Table 66. Blair Vison Care Color Blind Test Product Offered
Table 67. Blair Vison Care Color Blind Test Revenue ($ million), Gross Margin and Market Share (2020-2025)
Table 68. Blair Vison Care Main Business
Table 69. Blair Vison Care Latest Developments
Table 70. Richmond Eye Associates Details, Company Type, Color Blind Test Area Served and Its Competitors
Table 71. Richmond Eye Associates Color Blind Test Product Offered
Table 72. Richmond Eye Associates Color Blind Test Revenue ($ million), Gross Margin and Market Share (2020-2025)
Table 73. Richmond Eye Associates Main Business
Table 74. Richmond Eye Associates Latest Developments
Table 75. iristech Details, Company Type, Color Blind Test Area Served and Its Competitors
Table 76. iristech Color Blind Test Product Offered
Table 77. iristech Color Blind Test Revenue ($ million), Gross Margin and Market Share (2020-2025)
Table 78. iristech Main Business
Table 79. iristech Latest Developments

List Of Figures

LIST OF FIGURES

Figure 1. Color Blind Test Report Years Considered
Figure 2. Research Objectives
Figure 3. Research Methodology
Figure 4. Research Process and Data Source
Figure 5. Global Color Blind Test Market Size Growth Rate (2020-2031) ($ millions)
Figure 6. Color Blind Test Sales by Geographic Region (2020, 2024 & 2031) & ($ millions)
Figure 7. Color Blind Test Sales Market Share by Country/Region (2024)
Figure 8. Color Blind Test Sales Market Share by Country/Region (2020, 2024 & 2031)
Figure 9. Global Color Blind Test Market Size Market Share by Type in 2024
Figure 10. Color Blind Test in School
Figure 11. Global Color Blind Test Market: School (2020-2025) & ($ millions)
Figure 12. Color Blind Test in Hospital
Figure 13. Global Color Blind Test Market: Hospital (2020-2025) & ($ millions)
Figure 14. Color Blind Test in Family
Figure 15. Global Color Blind Test Market: Family (2020-2025) & ($ millions)
Figure 16. Color Blind Test in Other
Figure 17. Global Color Blind Test Market: Other (2020-2025) & ($ millions)
Figure 18. Global Color Blind Test Market Size Market Share by Application in 2024
Figure 19. Global Color Blind Test Revenue Market Share by Player in 2024
Figure 20. Global Color Blind Test Market Size Market Share by Region (2020-2025)
Figure 21. Americas Color Blind Test Market Size 2020-2025 ($ millions)
Figure 22. APAC Color Blind Test Market Size 2020-2025 ($ millions)
Figure 23. Europe Color Blind Test Market Size 2020-2025 ($ millions)
Figure 24. Middle East & Africa Color Blind Test Market Size 2020-2025 ($ millions)
Figure 25. Americas Color Blind Test Value Market Share by Country in 2024
Figure 26. United States Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 27. Canada Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 28. Mexico Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 29. Brazil Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 30. APAC Color Blind Test Market Size Market Share by Region in 2024
Figure 31. APAC Color Blind Test Market Size Market Share by Type (2020-2025)
Figure 32. APAC Color Blind Test Market Size Market Share by Application (2020-2025)
Figure 33. China Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 34. Japan Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 35. South Korea Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 36. Southeast Asia Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 37. India Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 38. Australia Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 39. Europe Color Blind Test Market Size Market Share by Country in 2024
Figure 40. Europe Color Blind Test Market Size Market Share by Type (2020-2025)
Figure 41. Europe Color Blind Test Market Size Market Share by Application (2020-2025)
Figure 42. Germany Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 43. France Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 44. UK Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 45. Italy Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 46. Russia Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 47. Middle East & Africa Color Blind Test Market Size Market Share by Region (2020-2025)
Figure 48. Middle East & Africa Color Blind Test Market Size Market Share by Type (2020-2025)
Figure 49. Middle East & Africa Color Blind Test Market Size Market Share by Application (2020-2025)
Figure 50. Egypt Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 51. South Africa Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 52. Israel Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 53. Turkey Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 54. GCC Countries Color Blind Test Market Size Growth 2020-2025 ($ millions)
Figure 55. Americas Color Blind Test Market Size 2026-2031 ($ millions)
Figure 56. APAC Color Blind Test Market Size 2026-2031 ($ millions)
Figure 57. Europe Color Blind Test Market Size 2026-2031 ($ millions)
Figure 58. Middle East & Africa Color Blind Test Market Size 2026-2031 ($ millions)
Figure 59. United States Color Blind Test Market Size 2026-2031 ($ millions)
Figure 60. Canada Color Blind Test Market Size 2026-2031 ($ millions)
Figure 61. Mexico Color Blind Test Market Size 2026-2031 ($ millions)
Figure 62. Brazil Color Blind Test Market Size 2026-2031 ($ millions)
Figure 63. China Color Blind Test Market Size 2026-2031 ($ millions)
Figure 64. Japan Color Blind Test Market Size 2026-2031 ($ millions)
Figure 65. Korea Color Blind Test Market Size 2026-2031 ($ millions)
Figure 66. Southeast Asia Color Blind Test Market Size 2026-2031 ($ millions)
Figure 67. India Color Blind Test Market Size 2026-2031 ($ millions)
Figure 68. Australia Color Blind Test Market Size 2026-2031 ($ millions)
Figure 69. Germany Color Blind Test Market Size 2026-2031 ($ millions)
Figure 70. France Color Blind Test Market Size 2026-2031 ($ millions)
Figure 71. UK Color Blind Test Market Size 2026-2031 ($ millions)
Figure 72. Italy Color Blind Test Market Size 2026-2031 ($ millions)
Figure 73. Russia Color Blind Test Market Size 2026-2031 ($ millions)
Figure 74. Egypt Color Blind Test Market Size 2026-2031 ($ millions)
Figure 75. South Africa Color Blind Test Market Size 2026-2031 ($ millions)
Figure 76. Israel Color Blind Test Market Size 2026-2031 ($ millions)
Figure 77. Turkey Color Blind Test Market Size 2026-2031 ($ millions)
Figure 78. Global Color Blind Test Market Size Market Share Forecast by Type (2026-2031)
Figure 79. Global Color Blind Test Market Size Market Share Forecast by Application (2026-2031)
Figure 80. GCC Countries Color Blind Test Market Size 2026-2031 ($ millions)