Leber congenital amaurosis in adults

Leber congenital amaurosis is a rare inherited retinal condition causing severe vision loss from birth or early infancy, due to abnormal development or function of the light-sensing cells in the retina. It's one of the most common causes of inherited blindness in children, but affected individuals live into adulthood with the condition.

It's caused by mutations in one of several genes essential for normal retinal function, most inherited in an autosomal recessive pattern, meaning both parents carry a copy of a faulty gene. Identifying the specific gene involved is important as it affects prognosis and treatment options.

Adults living with the condition typically have severe, longstanding vision impairment or blindness present since infancy, sometimes with light sensitivity, nystagmus (involuntary eye movements), and other associated eye findings. The degree of vision loss varies depending on the specific genetic cause.

It doesn't affect general health or life expectancy, but it does cause significant, usually lifelong visual impairment. Some specific genetic subtypes may be associated with other health issues that need monitoring, depending on the gene involved.

Yes, it's a genetic condition, and genetic testing to identify the specific gene involved is important because it can determine eligibility for specific treatments, including gene therapy for certain gene mutations. Genetic counselling is recommended for affected families.

For a specific gene mutation (RPE65), a licensed gene therapy (Luxturna) can improve vision in appropriately selected patients. For other gene mutations, there's currently no curative treatment, though supportive low-vision services and ongoing research into further gene therapies offer hope.

Management includes regular ophthalmology monitoring, genetic testing to identify the specific mutation and check treatment eligibility, and access to low-vision support services and visual aids. Ongoing research means new treatment options continue to develop for specific genetic subtypes.

The impact varies considerably depending on the degree of vision loss, but many adults with the condition lead full, independent lives with appropriate visual aids, technology and support services. Early access to low-vision rehabilitation services makes a significant difference.

Leber congenital amaurosis specifically causes severe vision loss from birth or very early infancy, whereas other inherited retinal dystrophies, such as retinitis pigmentosa, typically cause more gradual vision loss starting later in childhood or adulthood. Genetic testing helps distinguish between these related but distinct conditions.

Regular ophthalmology review is recommended to monitor eye health and check for eligibility for any new treatments as they become available. Private ophthalmology and genetics consultations can typically be arranged within about two weeks, considerably faster than standard NHS waiting times.