Half the world’s population (nearly 5 billion) will be short-sighted (myopic) by 2050, with up to one-fifth of them (1 billion) at a significantly increased risk of blindness if current trends continue, says a study published in the journal Ophthalmology. The rapid increase in the prevalence of myopia globally is attributed to, environmental factors (nurture), principally lifestyle changes resulting from a combination of decreased time outdoors and increased near work activities, among other factors.
— Source Brien Holden Vision Institute | 2016