July 2018
Volume 59, Issue 9
Open Access
ARVO Annual Meeting Abstract  |   July 2018
Prevalence and Characteristics of Primary Angle Closure Disease in an Adult Chinese American Population: The Chinese American Eye Study
Author Affiliations & Notes
  • Benjamin Xu
    University of Southern California, South Pasadena, California, United States
  • Bruce Burkemper
    University of Southern California, South Pasadena, California, United States
  • Dom Grisafe
    University of Southern California, South Pasadena, California, United States
  • Mina Torres
    University of Southern California, South Pasadena, California, United States
  • Xuejuan Jiang
    University of Southern California, South Pasadena, California, United States
  • Roberta McKean-Cowdin
    University of Southern California, South Pasadena, California, United States
  • Rohit Varma
    University of Southern California, South Pasadena, California, United States
  • Footnotes
    Commercial Relationships   Benjamin Xu, None; Bruce Burkemper, None; Dom Grisafe, None; Mina Torres, None; Xuejuan Jiang, None; Roberta McKean-Cowdin, None; Rohit Varma, None
  • Footnotes
    Support  NEI Grant 017337, Unrestricted Grant from Research to Prevent Blindness
Investigative Ophthalmology & Visual Science July 2018, Vol.59, 2725. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Benjamin Xu, Bruce Burkemper, Dom Grisafe, Mina Torres, Xuejuan Jiang, Roberta McKean-Cowdin, Rohit Varma; Prevalence and Characteristics of Primary Angle Closure Disease in an Adult Chinese American Population: The Chinese American Eye Study. Invest. Ophthalmol. Vis. Sci. 2018;59(9):2725.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose : Primary angle closure glaucoma (PACG) is a leading cause of ocular morbidity and blindness worldwide. PACG is the most severe stage of primary angle closure disease (PACD), which also includes primary angle closure suspect (PACS) and primary angle closure (PAC). The majority of PACG occurs in Asian countries where its prevalence is well studied. However, data on the prevalence of PACG in the United States is limited, especially among Asian Americans. This study examines the prevalence of PACD in adult Chinese American eyes based on population-derived data from the Chinese American Eye Study (CHES).

Methods : 5492 Chinese Americans 50 years of age and older were recruited to CHES, a population-based study in Los Angeles, CA. 4426 received complete ophthalmologic exams, including visual acuity, intraocular pressure (IOP), slit-lamp examination, gonioscopy, and stereoscopic photography. PACS was defined as posterior trabecular meshwork that was not visible for 270 degrees or more on gonioscopy. PAC was defined as peripheral anterior synechiae (PAS) and/or IOP ≥ 21 mmHg without glaucomatous neuropathy (GON) in an eye with PACS. PACG was defined as evidence of GON in an eye with PACS. Suspected PACG (SPACG) was defined as GON in an eye that did not fit the definition of PACS but demonstrated previous laser peripheral iridotomy (LPI) or cataract surgery with presence of PAS.

Results : The prevalence of PACS, PAC, and PACG were 7.9% (95% CI: 7.1-8.8%), 3.1% (95% CI: 2.6-3.8%) and 0.4% (95% CI: 0.3-0.7%), respectively, in subjects without prior LPI or intraocular surgery. Prevalence of PACG was 0.6% when subjects with PACG and prior LPI (n = 11) or cataract surgery (n = 1) were included. Prevalence of PACG was 1.1% when the definition of angle closure was broadened to include SPACG (LPI, n = 11; cataract surgery, n = 9). Females had higher rates of PACS and PAC compared to PACG (p < 0.05). Age and intraocular pressure were greater in PACG compared to PACS and PAC subjects (p < 0.05). Refractive error, axial length, lens thickness, anterior chamber depth, and central corneal thickness were equal among all three groups (p > 0.05).

Conclusions : The prevalence of PACG is lower among Chinese Americans than East Asians based on standard definitions of angle closure. However, prevalences of PACS and PAC approximate rates seen in Asia.

This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×