IndiaIn the southern state of Andhra Pradesh. 1.84% of the population are blind and 8.09% are visually impaired (Dandona et al. discuss visual impairment in India: the Andhra Pradesh Eye Disease chew over. Br J Ophthalmol. 2002 Apr;86(4):373-7)In the southern state of Andhra Pradesh. 45.8% of visual impairment is due to refractive error (Dandona et al. discuss visual impairment in India: the Andhra Pradesh Eye Disease Study. Br J Ophthalmol. 2002 Apr;86(4):373-7)In the Kariapatti region of southern India around 0.06% of children under the age of 16 are blind and 42.9% of this blindness is avoidable (Nirmalan et al. The Kariapatti pediatric eye evaluation project: baseline ophthalmic data of children aged 15 years or younger in Southern India. Am J Ophthalmol. 2003 Oct;136(4):703-9)An estimated 8%-10% of the population is diabetic (Ramachandran et al. NIDDM in an urban population in India. Diabetologia. 1997;40:232-237)Based on data from a large study performed in the southern express of Andhra Pradesh an estimated 680,000 children in India are blind. 226,440 of whom are blind due to easily correctable refractive error. This amounts to a prevalence of childhood blindness of around 0.17% (Dandona. R and Dandona. L. Childhood blindness in India: a population based perspective. Br J Ophthalmol. 2003 Mar;87(3):263-5)Blindness tends to be more common in rural areas: in Andhra Pradesh state the prevalence of blindness was 1.36% in the urban areas and 2.03% in rural areas and in the state of Rajasthan. 6.7% of adults over 50 living in urban areas were blind compared to 12.8% of adults over 50 living in rural areas (Dandona. R and Dandona. L. Socioeconomic status and blindness. Br J Ophthalmol. 2001 Dec;85(12):1484-8)19.65% of bilateral blindness in adults over the age of 50 is due to refractive error (Murthy et al. Current estimates of blindness in India. Br J Ophthalmol. 2005 Mar;89(3):257-60)cataract blindness affects 5.3% of adults over the age of 50 (Murthy et al. Current estimates of blindness in India. Br J Ophthalmol. 2005 Mar;89(3):257-60)8.5% of adults over the age of 50 have vision
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