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Both Julia and Madeleine have a coloboma of the iris - a rare eye abnormality that affects one in every 10,000 babies.

The litter's two female cubs also have coloboma, but not to the same degree.

She doesn’t mind when her peers at Dunbar Middle School ask about her eyes - she has coloboma, which means her iris isn’t closed entirely, giving her eyes a cat-like appearance.

She has detached retinas, glaucoma and coloboma, a hole in part of her eye.

Ms. Negrin, who has coloboma, a that perforates a structure of the eye and afflicts about 1 in 10,000 people, is an employee at OrCam, an Israeli start-up that has developed a camera-based system intended to give the visually impaired the ability to both “read” easily and move freely.