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RESEARCH STUDY

RESEARCH

Impact Evaluation: A Case Control Study in Andhra Pradesh, India

AUTHOR:

University of Michigan

SPONSOR/INSTITUTION:

YEAR PUBLISHED:

2015

PUBLICATION:

VisionSpring

KEY HIGHLIGHTS:

  • To evaluate the impact of wearing reading glasses in increasing work-related productivity among the population living with Presbyopia

  • To evaluate the impact of wearing reading glasses in increasing monthly income among the population living with Presbyopia

METHODOLOGY:

  • Customer and comparison group matched for age, income, livelihood, and village type

  • Customers: defined as those who attended a VisionSpring eye camp, had Presbyopia and chose to buy reading glasses

  • Controls: defined as those who attended a VisionSpring eye camp, had Presbyopia, and chose not to buy reading glasses

  • Sampling plan:

  • Total sample distributed across four districts of varying socioeconomic status in AP

  • Exit interview of respondents (case and control) as per availability and comfort of respondent recruited at the eye camp site

  • Oral informed consent

  • Interview using structured questionnaire

  • Matched sample Size

  • 261 customers (variable group)

  • 205 comparison group members (control group)

CONCLUSIONS:
Those wearing reading glasses reported significantly higher monthly income growth (20%) as compared to those not wearing reading glasses.


Those wearing reading glasses reported significantly higher productivity (34%) as compared to those not wearing reading glasses.