PREVALENCE AND CAUSES OF VISUAL IMPAIRMENT IN TEHRAN: THE TEHRAN EYE STUDY

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HASHEMI H.; FOTOUHI A.; MOHAMMAD K.; HOJAT JALALI K.

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Journal: JOURNAL OF CURRENT OPHTHALMOLOGY Year:2004 | Volume:16 | Issue:2 Page(s): 3-12

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Title

PREVALENCE AND CAUSES OF VISUAL IMPAIRMENT IN TEHRAN: THE TEHRAN EYE STUDY

Author(s)

HASHEMI H. | FOTOUHI A. | MOHAMMAD K. | HOJAT JALALI K. | Issue Writer Certificate

Keywords

BLINDNESSQ4

PREVALENCEQ4

CROSS-SECTIONAL STUDYQ4

TEHRANQ4

LOW VISIONQ4

CATARACTQ4

REFRACTIVE ERRORSQ4

MACULAR DEGENERATIONQ3

AMBLYOPIAQ4

Abstract

Aims: To determine the PREVALENCE and causes of visual impairment in TEHRAN through a population-based study. Methods: Through a population-based, CROSS-SECTIONAL STUDY, a total of 6497 citizens of TEHRAN were sampled from 160 clusters using a stratified, random, cluster sampling strategy. Eligible individuals were enumerated through a door-to-door household survey in the selected clusters and were invited. All participants were transferred to a clinic for an extensive eye examination and interview. Visual impairment was determined using presenting and best-corrected visual acuity (low vision: visual acuity of less than 6/18 to 3/60 in the better eye; BLINDNESS: visual acuity of less than 3/60 in the better eye). Results: Of those sampled, 4565 (70.3%) people participated in the study. Age – and gender - standardized PREVALENCE of visual impairment on the basis of best-corrected and presenting visual acuity were 1.39% (95% confidence interval [CI], 1.07 to 1.71) and 2.52% (95% CI, 2.07 to 2.97), respectively. Fifteen people (0.28%; 95% CI, 0.14 to 0.42) were blind with corrected vision while 22 people (0.39%; 95% CI, 0.23 to 0.56) were blind with presenting vision. Using corrected and presenting vision, the PREVALENCE of LOW VISION was 1.11% (95% CI, 0.84 to 1.39) and 2.13% (95% CI, 1.71 to 2.55), respectively. Causes of visual impairment according to best-corrected vision were CATARACT (36.0%), MACULAR DEGENERATION (20.0%), and AMBLYOPIA (10.7%). However, according to presenting vision, uncorrected REFRACTIVE ERRORS were the most frequent primary cause (33.6%) and CATARACT (25.4%), MACULAR DEGENERATION (12.7%) and AMBLYOPIA (8.2%) were the other main causes of visual impairment in the study sample. The PREVALENCE of visual impairment was associated with advancing age and lower education. Conclusion: The results indicate that the burden of visual impairment is important and although easily preventable, uncorrected REFRACTIVE ERRORS and CATARACT have a major role as causes of visual impairment in this population. Results also highlight the need for visual impairment prevention programs, with emphasis on treatment of REFRACTIVE ERRORS and CATARACT.

Cites

References

REPAIR OF CANALICULAR LACERATION WITH SILICONE INTUBATION

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APA: Copy

HASHEMI, H., FOTOUHI, A., MOHAMMAD, K., & HOJAT JALALI, K.. (2004). PREVALENCE AND CAUSES OF VISUAL IMPAIRMENT IN TEHRAN: THE TEHRAN EYE STUDY. JOURNAL OF CURRENT OPHTHALMOLOGY, 16(2), 3-12. SID. https://sid.ir/paper/53051/en

Vancouver: Copy

HASHEMI H., FOTOUHI A., MOHAMMAD K., HOJAT JALALI K.. PREVALENCE AND CAUSES OF VISUAL IMPAIRMENT IN TEHRAN: THE TEHRAN EYE STUDY. JOURNAL OF CURRENT OPHTHALMOLOGY[Internet]. 2004;16(2):3-12. Available from: https://sid.ir/paper/53051/en

IEEE: Copy

H. HASHEMI, A. FOTOUHI, K. MOHAMMAD, and K. HOJAT JALALI, “PREVALENCE AND CAUSES OF VISUAL IMPAIRMENT IN TEHRAN: THE TEHRAN EYE STUDY,” JOURNAL OF CURRENT OPHTHALMOLOGY, vol. 16, no. 2, pp. 3–12, 2004, [Online]. Available: https://sid.ir/paper/53051/en

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