Novel colour test chart development

Development of novel colour test chart for diagnosis and grading colour deficiency - CTfGCD

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCTs032200014

Enrollment

105

Registered

2020-04-14

Start date

2020-04-14

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Congenital colour deficiency Colour vision deficiency

Interventions

Use of unapproved colour test charts

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Those with prior diagnosis of normal colour vision and congenital colour deficiency

Exclusion criteria

Exclusion criteria: Those with prior diagnosis of any of the following; 1.Diabete mellitus 2.Hypertension 3.Intracranial lesions 4.Any ocular disease other than congenital colour deficiency

Design outcomes

Primary

Measure	Time frame
Diagnosis of correct type and severity of colour deficiency	—

Contacts

Public ContactAya Ohira

Ayameganka Toyoda Clinic

ironomiekata@protonmail.com+81-90-3206-9712

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026