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Influence of Distance and Near Visual Impairment on Self-Reported Near Visual Functioning in a Multinational Study.

Xiaotong Han1, Leon B Ellwein2, Amza Abdou3

  • 1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.

Ophthalmology
|July 12, 2020
PubMed
Summary
This summary is machine-generated.

Visual impairment significantly reduces self-reported visual functioning (VF). Both distance and near vision loss impact daily activities, with near vision often having a greater effect. Further research is needed.

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Area of Science:

  • Ophthalmology
  • Public Health
  • Epidemiology

Background:

  • Visual functioning (VF) is crucial for daily life and is affected by visual impairment.
  • Understanding the impact of distance and near vision loss across diverse populations is essential for targeted interventions.

Purpose of the Study:

  • To evaluate how distance and near visual impairment influence self-reported near visual functioning (VF) in a multinational population-based study.
  • To identify demographic factors associated with reduced visual functioning.

Main Methods:

  • A cross-sectional study involving 6851 participants aged 35+ from rural, semirural, and urban sites in Nepal, India, China, South Africa, Niger, and the United States.
  • Binocular distance and near visual acuity (VA) were measured. A 12-item near VF questionnaire assessed overall eyesight, difficulty with activities, and social functioning.
  • Multiple linear regression analyzed the association of age, gender, education, and VA with VF subscale scores.

Main Results:

  • Lower visual functioning (VF) scores were significantly associated with worse distance and near visual acuity (VA); even mild impairment reduced VF.
  • Older age, female gender, and higher education levels were associated with lower VF scores at various sites.
  • The impact of near VA on VF was greater than distance VA at most sites, though variations existed.

Conclusions:

  • Reduced distance and near visual acuity significantly decrease visual functioning across diverse populations, with considerable inter-site variability.
  • The influence of near vision impairment on overall visual functioning warrants greater emphasis and further investigation in varied socioeconomic and cultural contexts.