5 Facts you should know about

Kearns-Sayres syndrome

Kearns-Sayre Syndrome (KSS) is a rare neuromuscular disorder characterized by onset before the age of 20, chronic progressive external ophthalmoplegia (CPEO), and pigmentary retinopathy

Individuals with KSS may experience weakness in the facial and extraocular muscles, leading to difficulty moving the eyes and ptosis (drooping of the eyelids)

Pigmentary retinopathy, a degeneration of the retina, can cause vision loss and impaired color perception

KSS is associated with mitochondrial DNA deletions, affecting the energy-producing structures within cells

Diagnosis involves clinical evaluation, muscle biopsy, and genetic testing to identify mitochondrial DNA abnormalities

See our full disease profile

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