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Myopia screening: combining visual acuity and noncycloplegic autorefraction.

Yingyan Ma1, Xiangui He, Haidong Zou

  • 1*MM †MPH ‡MD Department of Ophthalmology, Shanghai First People's Hospital, Affiliated Shanghai Jiaotong University, Shanghai, China (YM, HZ); Shanghai Eye Disease Prevention and Treatment Center, Shanghai, China (XH, HZ, LL, JZ); and Department of Ophthalmology, Shanghai Eye and ENT Hospital, Affiliated Fudan University, Shanghai, China (XQ).

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|October 29, 2013
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Summary

Combining uncorrected visual acuity (UCVA) and noncycloplegic autorefraction (NCAR) improves myopia screening in schoolchildren. This combined approach offers higher sensitivity for detecting myopia compared to individual tests.

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Area of Science:

  • Ophthalmology
  • Public Health
  • Pediatric Optometry

Background:

  • Myopia is a growing public health concern, particularly in school-aged populations.
  • Effective large-scale screening methods are crucial for early detection and intervention.
  • Previous screening methods have limitations in sensitivity and specificity.

Purpose of the Study:

  • To evaluate the effectiveness of combining uncorrected visual acuity (UCVA) and noncycloplegic autorefraction (NCAR) for myopia screening.
  • To assess this combined approach in a population of schoolchildren with a high prevalence of myopia.
  • To determine optimal criteria for the combined screening method.

Main Methods:

  • A study involving 1687 children aged 6-12 years in Shanghai.
  • Measurements included UCVA and autorefraction (before and after cycloplegia).
  • Receiver operating characteristic (ROC) curves were used to determine optimal cutoffs, sensitivities, and specificities for individual and combined tests, setting specificity at 90%.

Main Results:

  • Out of 1639 children, 26.11% were myopic (SER ≤ -0.5 D).
  • The combined UCVA (20/20) and NCAR (SER ≤ -0.75 D) achieved 84.4% sensitivity and 90.5% specificity.
  • At 90% specificity, the combined test showed higher sensitivity (84.35%) compared to UCVA (63.55%) and NCAR (78.50%).

Conclusions:

  • Combining UCVA and NCAR in serial order is a more sensitive method for myopia screening in high-prevalence populations.
  • This integrated approach enhances detection rates while maintaining high specificity.
  • The findings support the use of combined UCVA and NCAR for efficient school-based myopia screening programs.