June 2015
Volume 56, Issue 7
Free
ARVO Annual Meeting Abstract  |   June 2015
The prevalence and causes of blindness and vision impairment in Trinidad and Tobago
Author Affiliations & Notes
  • Tasanee Braithwaite
    Vision and Eye Research Unit, Anglia Ruskin University, Cambridge, United Kingdom
  • Debra Bartholomew
    Department of Ophthalmology, Port of Spain General Hospital, Port of Spain, Trinidad and Tobago
  • Frank Deomansingh
    Department of Optometry, University of the West Indies, St Augustine Campus, Trinidad and Tobago
  • Amandi Fraser
    Department of Optometry, University of the West Indies, St Augustine Campus, Trinidad and Tobago
  • Vedatta Maharaj
    Department of Optometry, University of the West Indies, St Augustine Campus, Trinidad and Tobago
  • Petra Bridgemohan
    Department of Ophthalmology, Sangre Grande Hospital, Sangre Grande, Trinidad and Tobago
  • Subash Sharma
    Department of Optometry, University of the West Indies, St Augustine Campus, Trinidad and Tobago
  • Deo Singh
    Faculty of Medical Sciences, University of the West Indies, St Augustine, Trinidad and Tobago
  • Samuel S Ramsewak
    Faculty of Medical Sciences, University of the West Indies, St Augustine, Trinidad and Tobago
  • Rupert R A Bourne
    Vision and Eye Research Unit, Anglia Ruskin University, Cambridge, United Kingdom
  • Footnotes
    Commercial Relationships Tasanee Braithwaite, None; Debra Bartholomew, None; Frank Deomansingh, None; Amandi Fraser, None; Vedatta Maharaj, None; Petra Bridgemohan, None; Subash Sharma, None; Deo Singh, None; Samuel Ramsewak, None; Rupert Bourne, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2015, Vol.56, 2102. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Tasanee Braithwaite, Debra Bartholomew, Frank Deomansingh, Amandi Fraser, Vedatta Maharaj, Petra Bridgemohan, Subash Sharma, Deo Singh, Samuel S Ramsewak, Rupert R A Bourne, NESTT Study Group; The prevalence and causes of blindness and vision impairment in Trinidad and Tobago. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):2102.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose: To estimate the prevalence and causes of blindness and vision impairment in people aged >40 years in Trinidad and Tobago

Methods: A population-based nationally-representative cross-sectional survey, using randomized multistage cluster sampling with probability-proportionate-to-size methods, identified 120 clusters each of 35 people. The attributable cause of vision loss was determined for each eye with presenting visual acuity worse than 6/18, following comprehensive examination. Retinal images were graded by a Reading Centre to provide independent validation.

Results: Of 4200 people enumerated and invited for comprehenisve examination, 3588 were examined (85.4%). The age and gender-adjusted prevalence of functional blindness (presenting visual acuity worse than 6/60 in the better eye) was 0.32% (95% CI 0.14 to 0.50), and of blindness at 3/60 was 0.22% (95% CI 0.07 to 0.37%). The age and gender-adjusted prevalence of moderate and severe vision impairment (presenting acuity worse than 6/18 but better than or equal to 3/60 in the better seeing eye) was 2.42% (95% CI 1.92 to 2.92%). Cataract was the commonest cause of functional blindness (35.1%), and a leading cause of vision impairment (33.5%). The other main causes of blindness were diabetic retinopathy (18.9%) and glaucoma (16.2%). Uncorrected refractive error was the leading cause of moderate and severe vision impairment (34.3%).

Conclusions: This is one of only two nationally-representative studies of vision loss to be conducted in the Caribbean for the past 20 years, and makes an important contribution to understanding the local and regional vision loss burden. Strategies to make good quality, affordable and accessible cataract, refractive error and diabetic retinopathy screening services available in Trinidad and Tobago will have the greatest impact on reducing the burden of avoidable vision loss.

×
×

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.

×