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The median change in NDS score was 1.0 (range 1-7, SD 1.68). INTERPRETATION Vision development continues after 12 months of age in many toddlers if they have basic 'form' vision. A measure of detection vision is feasible in very young children when resolution acuity measurement is not achievable. WHAT THIS PAPER ADDS The Near Detection Scale (NDS) can measure low levels of vision when acuity is not otherwise measurable. Vision can improve in toddlers with severe visual impairment who have some 'form' vision. Infants with light perception at best by 12 month
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