The app can also help travellers with the disease pinpoint hotels, should they find themselves too far from base to get home safely.
Kamran Ahsan, Obaid Khan and Abdul Salam of the Federal Urdu University of Arts, Science and Technology, in Karachi, explain how night blindness, nyctalopia, afflicts millions and may be present at birth as a genetic disease, arise in childhood through malnutrition or injury or be a symptom of numerous eye diseases.
The smartphone app will allow sufferers to safely leave their home knowing that their phone is keeping track of their whereabouts and can calculate both the remaining daylight hours available and estimate how long it will take the person to reach their base before nightfall.
The application is geo-aware and so knows the time of sunset around the world as well as having access to online mapping software which can offer the potentially vulnerable user with shortcuts back to their base.
Moreover, it also has the added benefit of being able to locate nearby hotels should the user need to reach one before darkness falls.
The researchers have had a positive response from sufferers of night blindness who recognise that the smart phone app would be a boon to their lives not only in their hometown but when they travel to other cities.
The research is published in the International Journal Mobile Learning and Organisation.
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