Short answer · Medically reviewed summary · Last updated: 2026-05-08
Best Vitelliform Macular Dystrophy, often referred to as Best disease, is a rare inherited eye condition with an estimated prevalence between 1 in 10,000 and 1 in 20,000 individuals. While accurate global numbers remain challenging to determine due to underdiagnosis, the condition is recognized as a rare autosomal dominant macular dystrophy affecting the retinal pigment epithelium. What is the estimated prevalence and incidence of Best Vitelliform Macular Dystrophy? Epidemiological data for Best Vitelliform Macular Dystrophy suggests a prevalence of approximately 1 to 5 per 100,000 people, though some clinical literature cites higher estimates due to the variability of the clinical phenotype.
What is the prevalence of Best Vitelliform Macular Dystrophy?
Prevalence of Best Vitelliform Macular Dystrophy: how many people are affected worldwide, differences by sex and region, with sources.
Best Vitelliform Macular Dystrophy, often referred to as Best disease, is a rare inherited eye condition with an estimated prevalence between 1 in 10,000 and 1 in 20,000 individuals. While accurate global numbers remain challenging to determine due to underdiagnosis, the condition is recognized as a rare autosomal dominant macular dystrophy affecting the retinal pigment epithelium.
What is the estimated prevalence and incidence of Best Vitelliform Macular Dystrophy?
Epidemiological data for Best Vitelliform Macular Dystrophy suggests a prevalence of approximately 1 to 5 per 100,000 people, though some clinical literature cites higher estimates due to the variability of the clinical phenotype. Because many individuals with Best Vitelliform Macular Dystrophy remain asymptomatic for years, the true incidence and prevalence are likely higher than documented clinical cases. Within the DiseaseMaps.org platform, 6 members have identified as having Best Vitelliform Macular Dystrophy, highlighting the importance of patient-led registries in tracking rare conditions.
Who is affected by Best Vitelliform Macular Dystrophy?
Best Vitelliform Macular Dystrophy does not show a significant predilection for either sex, affecting males and females equally. Regarding age of onset, the disease is typically diagnosed in childhood or adolescence, though it can manifest in adulthood. There are no definitive geographic or ethnic clusters identified for Best Vitelliform Macular Dystrophy, as it is a genetic condition caused by mutations in the BEST1 gene.
Why is accurate data for Best Vitelliform Macular Dystrophy difficult to obtain?
- Asymptomatic presentation: Many patients with Best Vitelliform Macular Dystrophy maintain good central vision for years, leading to missed diagnoses during routine exams.
- Variable expression: The severity of Best Vitelliform Macular Dystrophy can vary significantly even within the same family.
- Misdiagnosis: Symptoms can sometimes be confused with other macular degenerations, such as age-related macular degeneration (AMD).
Next steps
- Consult a retina specialist or an ophthalmologist with expertise in inherited retinal dystrophies.
- Seek genetic counseling to understand the inheritance pattern of your specific BEST1 mutation.
- Join the DiseaseMaps.org community to connect with others sharing their experiences with Best Vitelliform Macular Dystrophy.
- Regularly monitor your vision using an Amsler grid as recommended by your eye care provider.
Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.
References
- Orphanet: Best vitelliform macular dystrophy (ORPHA:98918)
- NIH Genetic and Rare Diseases Information Center (GARD): Best disease
- OMIM (Online Mendelian Inheritance in Man): #153700 Macular dystrophy, vitelliform, 2
- American Academy of Ophthalmology: Inherited Retinal Diseases
