Partial color vision deficiency

At a Glance

Partial color vision deficiency is a category of color vision deficiency where it is difficult to distinguish between certain colors.

Specific color combinations may be confused, or the saturation and lightness of colors may be perceived differently, but even with color vision deficiency, visual acuity itself can remain normal.

How the Disease Works

Causes or related factors can include congenital differences in retinal cone cells or genetic variations related to color vision, retinal or optic nerve diseases, and medications.

If differences occur in the function of the cone cells that detect color or in the processing of visual signals, the way color information is distinguished may change.

Patterns Vary by Person

The type and degree of color vision deficiency may vary depending on genetic background, family history, age of onset, accompanying ocular diseases, and medications being taken.

Broad framework of diagnosis and management

Congenital partial color vision deficiency is usually long-lasting, whereas acquired color vision deficiency may change depending on the progression of the underlying disease or related factors.

Diagnosis is performed by checking symptoms and family history, and comprehensively evaluating color vision tests, visual acuity assessment, and ophthalmic examinations to identify the presence and pattern of color vision deficiency.

Current stage of treatment

Since color vision test results can be influenced by lighting, testing tools, age, understanding of the test, and learning effects from repeated testing, the type or cause is not determined by a single test alone.

Management focuses on identifying the impact of color vision difficulties on daily life, academics, and occupation, and preparing necessary environmental adjustments and safety strategies.

Established general treatments for reverting congenital partial color vision deficiency to normal color vision are limited, and in acquired cases, evaluation and treatment of the underlying cause are important.

How to read clinical trials

If color vision changes newly occur or worsen, an evaluation is necessary to identify the cause and progression, and participation in research or experimental approaches should be viewed separately from established treatments.

Points to verify in clinical encounters

In clinical practice, it is helpful to check the onset and changes in symptoms, confused colors, family history, medications being taken, underlying ocular diseases, and safety issues encountered in daily life and occupation.