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Living with Progressive retinal dystrophy due to retinol transport defect

A rare genetic eye condition that causes night vision trouble in childhood and gradual loss of sharp vision.

Understanding Progressive retinal dystrophy due to retinol transport defect

Progressive retinal dystrophy due to retinol transport defect is a rare genetic disorder in which the body doesn't properly carry vitamin A (retinol), affecting the retina.

It causes a slowly worsening loss of the retina's rod and cone cells. It usually shows up in childhood as trouble seeing at night, followed by gradual loss of sharp vision. Blood levels of retinol are very low. Eye differences (colobomas), severe acne, and high cholesterol have also been reported.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Night blindness (nyctalopia)
  • Reduced clarity of vision
  • Gap or notch in the iris (iris coloboma)
  • Blue-yellow color vision changes
  • Acne
  • Rough, bumpy skin (follicular hyperkeratosis)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include eye disease specialists and genetic specialists.

  3. Consider genetic testing

    Changes in RBP4 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Foundation Fighting Blindness may keep lists of experts for this condition.

Care & treatment

Care team
Eye disease specialists (ophthalmologists); Genetic specialists (geneticists)
Expert care
Expert lists: Foundation Fighting Blindness
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Foundation Fighting Blindness
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Would genetic testing for the RBP4 gene help our family?
How often should vision be checked by an eye specialist?
Do my cholesterol and skin need monitoring?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Recessive
GenesRBP4

This condition is caused by changes in the RBP4 gene. A child inherits a changed copy of the gene from each parent (autosomal recessive).

GeneticInherited Metabolic

Also known as: retinal dystrophy, iris coloboma, and comedogenic acne syndrome; retinol dystrophy-iris coloboma-comedogenic acne syndrome

Patient organizations

Source: NIH GARD · Progressive retinal dystrophy due to retinol transport defectGARD ID 17529 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Progressive retinal dystrophy due to retinol transport defect.

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