| Phenotype details | see paper; ...; 54y-deceased; normal early developmental milestones.; 6y-bilateral keratoconus requiring corneal transplantation in early adulthood; at school handwriting slow and clumsy; 19y-started walking on toes, mild speech impairment, grasping difficulties, developed progressive gait problems, needed walking aids, 42y-wheelchair-bound; increased eye blinking, repetitive oromandibular grimacing; developed progressively increased muscle tone  extremities, unable to speak a few years into the disease; no seizures |