Nuclear Sclerotic Cataract (Video)

In this video you can see what a typical cataract looks like under the microscope in real life. The central nucleus has turned brunescent (yellowish) such that this patient is suffering from decreased vision that is exacerbated by bright lights.

The lens is constructed with three components and has a configuration similar to a “peanut M&M candy.” There is an outer capsule (the hard candy shell), the middle cortex (the chocolate) and the central nuclues (the nut). Cataracts can form at any level, though typically they form in the central nucleus like you can see in this video.

Download this video

To download this video, right click on a link below and choose “Save Target As…”

nscataract.wmv (2.3meg, Windows video file)


NS cataract
This photo shows a nuclear sclerotic cataract. You can see the brown central nucleus that lights up with the slit-lamp beam.
Nuclear sclerotic cataract
This microscopic snapshot shows a typical nuclear sclertic cataract. These lenses look brunescent (brown/yellow) and light up with a thin slit-lamp light (like in this photo).

Dr. Timothy Root is a practicing ophthalmologist and cataract surgeon in Daytona Beach, Florida. His books, video lectures, and training resources can be found at:


  1. Wish the video was longer, I was just told I have the beginning of nuclear sclerotic cataracts and was looking for a good video. Are there more that apply?

    Tim Root: Dee, you may want to watch our introduction to cataract lecture here.


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