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Is there any pain in the affected eye?
She has most probably developed hypermature cataract with secondary glaucoma. The eye pressure must be raised which ahs caused the eye to be red, pupil dialted and the vision blurred. She can lose vision permanaently from optic nerve damage due to raised eye pressure if this diagnosis is correct. Cataract surgery needs to be done on an urgent basis. You should immediately take her to an ophthalmologist. Thanks and best wishes.
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