May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Four-Year Incidence of Visual Impairment in a Latino Population: The Los Angeles Latino Eye Study (LALES-II)
Author Affiliations & Notes
  • S. P. Azen
    USC Keck School of Medicine, Los Angeles, California
    Preventive Medicine,
  • J. Chung
    USC Keck School of Medicine, Los Angeles, California
    Preventive Medicine,
  • A. W. Foong
    USC Keck School of Medicine, Los Angeles, California
    Ophthalmology,
  • M. Torres
    USC Keck School of Medicine, Los Angeles, California
    Preventive Medicine,
  • R. Varma
    USC Keck School of Medicine, Los Angeles, California
    Ophthalmology,
  • LALES Group
    USC Keck School of Medicine, Los Angeles, California
  • Footnotes
    Commercial Relationships  S.P. Azen, None; J. Chung, None; A.W. Foong, None; M. Torres, None; R. Varma, None.
  • Footnotes
    Support  NEI EY 11753
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 4450. doi:https://doi.org/
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    • Get Citation

      S. P. Azen, J. Chung, A. W. Foong, M. Torres, R. Varma, LALES Group; Four-Year Incidence of Visual Impairment in a Latino Population: The Los Angeles Latino Eye Study (LALES-II). Invest. Ophthalmol. Vis. Sci. 2008;49(13):4450. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To present the 4-year incidence of visual impairment (VI) and blindness in a population based study of adult Latinos (primarily Mexican-Americans) age 40 and older who did not have VI at the baseline examination.

Methods: : Participants underwent a detailed ophthalmologic examination including measurement of best-corrected distance visual acuity (BCVA) using a standard ETDRS protocol. 4-year binocular VI or blindness was defined as 1) baseline presenting visual acuity (PVA)>20/40 and a follow-up PVA<20/40, or 2) baseline PVA>20/200 and a follow-up PVA≤20/200. The US-modified criterion for 4-year monocular VI or blindness in either eye was defined as: 1) a baseline BCVA≥20/40 and a follow-up BCVA< 20/40 but ≥20/200, or 2) baseline BCVA>20/200 and a follow-up BCVA≤20/200. The WHO-modified criterion for 4-year monocular VI or blindness in either eye was defined as: 1) a baseline BCVA≥20/63 and a follow-up BCVA<20/63 but ≥20/400, or 2) baseline BCVA>20/400 and a follow-up BCVA<20/400.

Results: : Of the 4520 participants who underwent a follow-up eye examination, 4.6% had binocular visual impairment, 2.7%, 12.6% and 3.2% (US-modified) vs. 1.5%, 7.4% and 1.7% (WHO-modified) had monocular VI in the 1st eye, 2nd eye and 1st or 2nd eye, respectively. In addition, 1.2%, 8.8% and 1.3% (US-modified) vs. 0.9%, 10.2% and 1.0% (WHO-modified) had blindness in the 1st eye, 2nd eye and 1st or 2nd eye, respectively.

Conclusions: : Age-specific incidence rates of VI and blindness in LALES-II are the highest reported in the U.S. Overall, the incidence of VI was considerably higher than that reported in the Beaver Dam Eye Study, which included primarily non-Hispanic white participants. Screening and intervention programs should primarily focus on the older Latino population.

Keywords: visual acuity • aging • clinical (human) or epidemiologic studies: natural history 
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