Trends in childhood visual impairment. Insights from a 10-year retrospective study at Alder Hey Children's Hospital.

The median age at registration was 73.9 months (IQR 13-106), comparable to the earlier cohort (76 months, range 1-192).

Certification as sight impaired increased from 48% to 62.8% (P < 0.05).

The new cohort showed wide variation in visual acuity (visual acuity) (median 1.0 logMAR, IQR 0.9-3.4).

52% had visual acuity of 1.0 logMAR or worse, whereas 15% had visual acuity ≤ 0.4 logMAR but qualified due to visual field or higher-order deficits.