Refractive Errors in Singapore and Xiamen, China—A Comparative Study in School Children Aged 6 to 7 Years

Purpose To compare and contrast the prevalence of myopia and other refractive errors in Xiamen city, Xiamen countryside (Southern China), and Singapore. Methods One hundred thirty-two schoolchildren aged 6 to 7 years from Xiamen city, 104 from Xiamen countryside, and 146 from Singapore city were recruited to join the study. Cycloplegic autorefraction, keratometry, and biometry measurements were performed on all children. Results The prevalence of myopia was 12.3% in Singapore city, 9.1% in Xiamen city, and 3.9% in Xiamen countryside. The prevalence of astigmatism was higher in Singapore compared with Xiamen. The rates of hyperopia and anisometropia were similar in all three locations. Conclusions The myopia rate in Singapore city was higher than in Xiamen city; the lowest rates were found in Xiamen countryside. As the Chinese population from all three sites is of similar genetic stock (predominantly from Southern China), it is postulated that the differences in myopia rates in these three localities may be related to environmental factors.

[1]  N. Congdon,et al.  Biometry and primary angle-closure glaucoma among Chinese, white, and black populations. , 1997, Ophthalmology.

[2]  J. Bear,et al.  REFRACTION, NEARWORK AND EDUCATION , 1980, Acta ophthalmologica.

[3]  L. Baxter,et al.  Astigmatism in Bangladeshi and white school entrants in East London: A prospective comparative study , 1995, Eye.

[4]  R. Held,et al.  Myopic children show insufficient accommodative response to blur. , 1993, Investigative ophthalmology & visual science.

[5]  L. Carney.  THE BASIS FOR CORNEAL SHAPE CHANGE DURING CONTACT LENS WEAR* , 1975, American journal of optometry and physiological optics.

[6]  K. Zadnik.  The Glenn A. Fry Award Lecture (1995). Myopia development in childhood. , 1997, Optometry and vision science : official publication of the American Academy of Optometry.

[7]  F. A. Young,et al.  THE PSYCHOLOGICAL DIFFERENTIATION OF MALE MYOPES AND NONMYOPES* , 1975, American journal of optometry and physiological optics.

[8]  D. Berson,et al.  The influence of study habits on myopia in Jewish teenagers. , 1993, Journal of pediatric ophthalmology and strabismus.

[9]  D. Goss,et al.  Refractive Error, Axial Length, and Height as a Function of Age in Young Myopes , 1990, Optometry and vision science : official publication of the American Academy of Optometry.

[10]  J. Wallman,et al.  Monkey eyes grow into focus , 1995, Nature Medicine.

[11]  D. Mutti,et al.  Initial Cross-Sectional Results from the Orinda Longitudinal Study of Myopia , 1993, Optometry and vision science : official publication of the American Academy of Optometry.

[12]  B. Robinson.  Factors associated with the prevalence of myopia in 6-year-olds. , 1999, Optometry and vision science : official publication of the American Academy of Optometry.

[13]  A. E. Sloane,et al.  The Myopias: Basic Science and Clinical Management , 1986 .

[14]  M. Bullimore,et al.  Myopia: an epidemic of possibilities? , 1999, Optometry and vision science : official publication of the American Academy of Optometry.

[15]  T. Grosvenor,et al.  Ocular dimensions and refractive power in Malay and Melanesian children , 1990, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

[16]  M. Yap,et al.  Environmental factors and refractive error in Chinese schoolchildren , 1994 .

[17]  J. Wallman,et al.  Local retinal regions control local eye growth and myopia. , 1987, Science.

[18]  Y. Shih,et al.  Epidemiologic study of ocular refraction among schoolchildren in Taiwan in 1995. , 1999, Optometry and vision science : official publication of the American Academy of Optometry.

[19]  D. Coggon,et al.  Education, reading, and familial tendency as risk factors for myopia in Hong Kong fishermen. , 1993, Journal of epidemiology and community health.

[20]  T. O. Pärssinen.  Relation between refraction, education, occupation, and age among 26- and 46-year-old Finns. , 1987, American journal of optometry and physiological optics.

[21]  T. Grosvenor,et al.  Role of the Axial Length/Corneal Radius Ratio in Determining the Refractive State of the Eye , 1994, Optometry and vision science : official publication of the American Academy of Optometry.

[22]  A. Halasa,et al.  THE REFRACTIVE STATE OF MALNOURISHED CHILDREN. , 1964, Archives of ophthalmology.

[23]  Earl L. Smith,et al.  Spectacle lenses alter eye growth and the refractive status of young monkeys , 1995, Nature Medicine.

[24]  J. Sjöstrand,et al.  A longitudinal study of a population based sample of astigmatic children: II. The changeability of anisometropia , 1990, Acta ophthalmologica.

[25]  L. Garner,et al.  Ocular Dimensions and Refraction in Tibetan Children , 1995, Optometry and vision science : official publication of the American Academy of Optometry.

[26]  M. Belkin,et al.  Intelligence, education, and myopia in males. , 1987, Archives of ophthalmology.

[27]  M. Dunne,et al.  A study of the axis of orientation of residual astigmatism , 1994, Acta ophthalmologica.

[28]  Josh Wallman,et al.  Nature and nurture of myopia , 1994, Nature.

[29]  J. Kaprio,et al.  Study of gene-environment effects on development of hyperopia: a study of 191 adult twin pairs from the Finnish Twin Cohort Study. , 1990, Acta geneticae medicae et gemellologiae.

[30]  J. Sjöstrand,et al.  A longitudinal study of a population based sample of astigmatic children I. Refraction and amblyopia , 1990, Acta ophthalmologica.

[31]  J. Bear,et al.  Nearwork and familial resemblances in ocular refraction: A population study in Newfoundland , 1981, Clinical genetics.

[32]  T. Teasdale,et al.  Myopia and its relationship to education, intelligence and height: Preliminary results from an on‐going study of Danish draftees , 1988, Acta ophthalmologica. Supplement.

[33]  D. Lee,et al.  Refractive errors and visual acuity impairment among self-selected Hispanic, white, and black adults examined by the UCLA Mobile Eye Clinic. , 1999, Journal of the American Optometric Association.