Posterior Segment
Best Vitelliform Macular Dystrophy
Also known as: best disease, best vitelliform macular dystrophy, BEST1, vitelliform macular dystrophy, egg yolk macula, pseudohypopyon macula, bestrophinopathy
Filed as: Routine
Source-cited from the record's own evidence list. Clinical content programme led by Dr Ankit Mathur, PhD, Grad Cert Ocu Thera, B.S. Optom. How the clinical content is governed
Clinical decision support only
Overview
Best vitelliform macular dystrophy is an autosomal dominant macular dystrophy linked to the BEST1 gene, with onset from early childhood to the late teens. A yellow egg-yolk-like lesion sits at each fovea and passes through stages: layering of the material (pseudohypopyon), break-up (vitelliruptive), then atrophy, sub-RPE fibrosis or choroidal neovascularisation. Vision is usually good for decades. The optometry role is to recognise and stage the lesion, watch for neovascularisation, and refer to establish the diagnosis.
Recognition
Symptoms: what patients report
- Often none: the lesion is commonly found at a routine examination in a child or teenager.
- Mild central blur or distortion as the lesion breaks up.
- A sudden drop in vision or new distortion raises concern for choroidal neovascularisation.
Signs: what the examination shows
- A single round yellow lesion at the fovea, usually in both eyes and fairly symmetrical.
- Later stages: material settles inferiorly (pseudohypopyon), then becomes scrambled, then gives way to atrophy or a fibrotic scar.
- OCT: early lesions are uniform bright material between the RPE and the neurosensory retina. Depending on stage there may be subretinal fluid, a neovascular membrane, or loss of the outer retinal layers.
- Fundus autofluorescence: the yellow material is bright; atrophy is dark.
What OptoGuide™ covers for best vitelliform macular dystrophy
- Pattern reasoning: what this combination of findings points to, and its differentiators
- Don't-miss risks and escalation triggers
- Management tiers with linked Australian therapeutics
- Referral urgency, specialty, and letter drafting