True about incontinenta pigmenti include the following except –
Ocular involvement occurs in 20-35% of cases. Involvement is assynzetrical. The two pathognomic changes are -


Retinal pigmentary changes with mottled diffuse hypopigmentation.
Abnormal peripheral retinal vessels with areas of non perfusion (a vascularity).
X-linked dominant
Primary skin abnormality
Avascularity of peripheral retina
Ocular involvement is seen in almost 100% cases and is typically unilateral