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This condition, which your doctor will call nyctalopia, makes it hard to see well at night or in poor light. It isn’t a disease, but rather a symptom of another problem like untreated nearsightedness.
What Causes It?
The problem comes from a disorder of the cells in your retina that allow you to see dim light. It has many causes:
To pinpoint the cause, your eye doctor will carry out a full exam. He may order specialized tests.
How Is Night Blindness Treated?
WebMD Medical Reference Reviewed by Alan Kozarsky, MD on November 29, 2015
Cleveland Clinic: "Night Blindness."
MedicineNet.com: "Night Blindness."