Understanding Cortical Visual Impairment (CVI): NIH’s 5 Key Elements Explained

The National Institutes of Health (NIH) announced a study on cerebral or cortical visual impairment (CVI) in children. CVI is a rising cause of vision impairment in childhood in the U.S. and other developed countries.

The NIH report, published in Ophthalmology, identifies five key elements related to CVI:

1. Brain Involvement: CVI is linked to brain function.
2. Visual Dysfunction: Symptoms are often worse than what eye exams show.
3. Types of Visual Deficits: Various deficits can present in children with CVI.
4. Overlap with Other Disorders: CVI can mimic or overlap with other neurological conditions.
5. Missed Diagnosis: Many cases of CVI are overlooked.

Lotfi B. Merabet, a co-author from Harvard Medical School, highlights that low awareness of CVI can lead to improper diagnosis or a complete lack of diagnosis. He emphasizes the importance of recognizing these factors for better identification and treatment.

Melinda Y. Chang from the University of Southern California stresses that improving awareness among eye care providers will help children receive necessary assessments sooner.

The National Eye Institute (NEI) is creating a registry to gather data on CVI. This will aid researchers in understanding CVI traits and improving diagnostic methods. More information can be found on the NIH CVI Registry webpage.

The NIH’s findings stem from a workshop with other health institutes. The American Academy of Pediatrics has also published a guide to help pediatricians understand CVI better.

Michael F. Chiang, director of the NEI, notes that more work is needed to enhance diagnostic methods and rehabilitation strategies for children with CVI. This is a priority area for ongoing development.