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Reproducibility of nearwork-induced transient myopia measurements using the WAM-5500 autorefractor in its dynamic mode

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Abstract

Purpose

To evaluate the reproducibility of nearwork-induced transient myopia (NITM) measurements obtained objectively using an open-field autorefractor (WAM-5500) in its dynamic mode.

Methods

NITM was assessed in 22, visually-normal, teen-aged and young-adult subjects using an infrared autorefractor (WAM-5500) in the dynamic mode. Measurements were obtained from the right eye in two test sessions separated by either 30 minutes or 2 days. Initial NITM and its decay were assessed monocularly by the same experimenter immediately after binocularly viewing and performing a detailed near task (5D) for 5 minutes incorporating a cognitive demand, with habitual distance refractive correction in place. Data were averaged over 10-second bins for 3 minutes (180 seconds; 18 bins) for the decay analysis. The NITM post- minus pre-task difference and its limits of agreement (LOA), as well as intraclass correlation coefficient (ICC), were calculated to evaluate reproducibility over the two test sessions for the initial NITM magnitude and its decay.

Results

The group mean (±SE) initial NITM and its decay duration were 0.33 ± 0.09 D and 0.28 ± 0.08 D, and 118.6 ± 14.3 seconds and 132.3 ± 12.2 seconds respectively, for each test session, which were not significantly different (p > 0.05). The difference (range), LOA, and ICC (95% confidence interval [CI]) were 0.06D (−0.15, 0.64), −0.29 to 0.40D, and 0.90D (0.77, 0.96) for the initial NITM; they were −13.6 (−150.0, 140.0) seconds, –174.5 to 147.3 seconds, and 0.14 (0.00, 0.52) for decay duration, respectively, for each test session. The ICC range for the first 50 secs of the NITM response/decay was 0.90 to 0.96.

Conclusions

The initial NITM was highly repeatable. The initial decay phase was moderately repeatable, with the later decay phase being more variable, yet still yielding acceptable reproducibility in many cases. Both of these key parameters, namely initial NITM and its early decay, can be assessed reliably and with good reproducibility. This is important in future longitudinal studies of NITM, and its possible relation to refractive development.

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References

  1. Mei Q, Rong Z (1994) Early signs of myopia in Chinese schoolchildren. Optom Vis Sci 71:14–16

    Article  PubMed  CAS  Google Scholar 

  2. Tan GJ, Ng YP, Lim YC, Ong PY, Snodgrass A, Saw SM (2000) Cross-sectional study of near-work and myopia in kindergarten children in Singapore. Ann Acad Med Singapore 29:740–744

    PubMed  CAS  Google Scholar 

  3. Kinge B, Midelfart A, Jacobsen G, Rystad J (2000) The influence of near-work on development of myopia among university students: a three-year longitudinal study among engineering students in Norway. Acta Ophthalmol Scand 78:26–29

    Article  PubMed  CAS  Google Scholar 

  4. Hepsen IF, Evereklioglu C, Bayramlar H (2001) The effect of reading and near-work on the development of myopia in emmetropic boys: a prospective, controlled, three-year follow-up study. Vis Res 41:2511–2520

    Article  PubMed  CAS  Google Scholar 

  5. Saw SM, Hong RZ, Zhang MZ, Fu ZF, Ye M, Tan D, Chew SJ (2001) Near-work activity and myopia in rural and urban schoolchildren in China. J Pediatr Ophthalmol Strabismus 38:149–155

    PubMed  CAS  Google Scholar 

  6. Chen JC, Schmid KL, Brown B (2003) The autonomic control of accommodation and implications for human myopia development: a review. Ophthalmic Physiol Opt 23:401–422

    Article  PubMed  Google Scholar 

  7. Ciuffreda KJ, Wallis DM (1998) Myopes show increased susceptibility to nearwork aftereffects. Invest Ophthalmol Vis Sci 39:1797–1803

    PubMed  CAS  Google Scholar 

  8. Vera-Diaz FA, Strang NC, Winn B (2002) Nearwork induced transient myopia during myopia progression. Curr Eye Res 24:289–295

    Article  PubMed  Google Scholar 

  9. Hung GK, Ciuffreda KJ (2007) Incremental retinal-defocus theory of myopia development—schematic analysis and computer simulation. Comput Biol Med 37:930–946

    Article  PubMed  Google Scholar 

  10. Ciuffreda KJ, Vasudevan B (2008) Nearwork-induced transient myopia (NITM) and permanent myopia—is there a link? Ophthalmic Physiol Opt 28:103–114

    Article  PubMed  Google Scholar 

  11. Ciuffreda KJ (1991) Accommodation and its anomalies. In: Charman WN (ed) Vision and visual dysfunction. MacMillan, London, pp 231–279

    Google Scholar 

  12. Vasudevan B, Ciuffreda KJ (2008) Additivity of near work-induced transient myopia and its decay characteristics in different refractive groups. Invest Ophthalmol Vis Sci 49:836–841

    Article  PubMed  Google Scholar 

  13. Wolffsohn JS, Gilmartin B, Li RW, Edwards MH, Chat SW, Lew JK, Yu BS (2003) Nearwork-induced transient myopia in preadolescent Hong Kong Chinese. Invest Ophthalmol Vis Sci 44:2284–2289

    Article  PubMed  Google Scholar 

  14. Wolffsohn JS, Gilmartin B, Thomas R, Mallen EA (2003) Refractive error, cognitive demand and nearwork-induced transient myopia. Curr Eye Res 27:363–370

    Article  PubMed  Google Scholar 

  15. Vasudevan B, Ciuffreda KJ, Gilmartin B (2009) Sympathetic inhibition of accommodation after sustained nearwork in subjects with myopia and emmetropia. Invest Ophthalmol Vis Sci 50:114–120

    Article  PubMed  Google Scholar 

  16. Ciuffreda KJ, Lee M (2002) Differential refractive susceptibility to sustained nearwork. Ophthalmic Physiol Opt 22:372–379

    Article  PubMed  Google Scholar 

  17. Win-Hall DM, Houser J, Glasser A (2010) Static and dynamic accommodation measured using the WAM-5500 Autorefractor. Optom Vis Sci 87:873–882

    Article  PubMed  Google Scholar 

  18. Sheppard AL, Davies LN (2010) Clinical evaluation of the Grand Seiko Auto Ref/Keratometer WAM-5500. Ophthalmic Physiol Opt 30:143–151

    Article  PubMed  Google Scholar 

  19. Krumholz DM, Fox RS, Ciuffreda KJ (1986) Short-term changes in tonic accommodation. Invest Ophthalmol Vis Sci 27:552–557

    PubMed  CAS  Google Scholar 

  20. Ong E, Ciuffreda KJ (1995) Nearwork-induced transient myopia: a critical review. Doc Ophthalmol 91:57–85

    Article  PubMed  CAS  Google Scholar 

  21. Ciuffreda KJ (1989) Nearwork-induced transient myopia: basic and clinical aspects. J Optom Vis Dev 30:5–20

    Google Scholar 

  22. Gilmartin B (1986) A review of the role of sympathetic innervation of the ciliary muscle in ocular accommodation. Ophthalmic Physiol Opt 6:23–37

    Article  PubMed  CAS  Google Scholar 

Download references

Conflict of interest

The authors have no commercial interests in the instrument used in this study, or in the company that manufactures the instrument.

Financial support

This study was supported by Beijing Science & Technology New Star Program (2009B44)

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Authors and Affiliations

  1. Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University; Beijing Ophthalmology & Visual Science Key Lab, Beijing, China

    Zhong Lin, Li Ya Qiao, Yuan Bo Liang & Ning Li Wang

  2. College of Optometry, Mid Western University, Glendale, AZ, USA

    Balamurali Vasudevan

  3. Anyang Eye Hospital, Anyang, Henan, China

    Yi Cao Zhang

  4. Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, University Eye Center, 3/F Hong Kong Eye Hosptial, 147K Argyle Street, Kowloon, Hong Kong, People’s Republic of China

    Yuan Bo Liang

  5. Department of Biological and Vision Sciences, SUNY State College of Optometry, New York, NY, USA

    Kenneth J. Ciuffreda

Authors
  1. Zhong Lin
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  2. Balamurali Vasudevan
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  3. Yi Cao Zhang
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  4. Li Ya Qiao
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  5. Yuan Bo Liang
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  6. Ning Li Wang
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  7. Kenneth J. Ciuffreda
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Corresponding author

Correspondence to Yuan Bo Liang.

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Lin, Z., Vasudevan, B., Zhang, Y.C. et al. Reproducibility of nearwork-induced transient myopia measurements using the WAM-5500 autorefractor in its dynamic mode. Graefes Arch Clin Exp Ophthalmol 250, 1477–1483 (2012). https://doi.org/10.1007/s00417-012-1986-8

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  • DOI: https://doi.org/10.1007/s00417-012-1986-8

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