Changes in refractive trends and optical components of Hong Kong Chinese aged over 40 years

C.S.Y. Lam, Winnie S.H. Goh, Y. K. Tang, K. K. Tsui, W. C. Wong, T. C. Man

Research output: Journal article publicationJournal articleAcademic researchpeer-review

81 Citations (Scopus)


The age trends of refractive errors, astigmatism and optical components were studied in 220 Chinese subjects aged over 40 years. Myopia did not dominate in this age group. With increasing age, the prevalence of hyperopia increases from 2% at age 40–45 years to 66% at age > 65 years. Against‐the‐rule astigmatism was more prevalent than the other types. Significant correlations were found between age and spherical equivalent power, age and vitreous depth and axial length. Sex differences were found among the optical components but not in the refractive error. Myopia appears to be more prevalent among the younger age groups than the older age groups of the Hong Kong Chinese population, and the importance of genetics in determination of refractive error is called into question by these findings.
Original languageEnglish
Pages (from-to)383-388
Number of pages6
JournalOphthalmic and Physiological Optics
Issue number4
Publication statusPublished - 1 Jan 1994

ASJC Scopus subject areas

  • Ophthalmology
  • Optometry
  • Sensory Systems

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