All the Light We Cannot See: how progressive congenital cataracts can lead to blindness

By Jay E. Self, Associate Professor and Consultant Ophthalmologist, University of Southampton

In the new Netflix series All the Light We Cannot See, a blind French girl called Marie-Laure LeBlanc makes illicit radio broadcasts from her uncle’s house in Nazi-occupied France. We are told that Marie-Laure has congenital cataracts in both eyes. But what is this condition?

The word “cataract” comes from the Latin word for waterfall and describes a condition where the usually transparent lens of the eye is cloudy or opaque. This prevents a clear image being projected onto the back of the eye and causes poor vision.…

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