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Comparison of Near Addition Value Prescription Methods for Myopic Children

Xinping Yu1, Jinhua Bao, Björn Drobe

  • 1*MD †PhD The Eye Hospital of Wenzhou Medical University (XY, JB, WL, GW, JX, HC); WMU-Essilor International Research Centre, Wenzhou, China (XY, JB, BD, WL, GW, JX, HC); and R&D Asia, Essilor International, Singapore (BD).

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|November 20, 2015
PubMed

Insights

Personalized near addition values for myopia control were compared. Sheard's criterion yielded lower values than null lag of accommodation, improving binocular balance in myopic children.

Area of Science:

  • Ophthalmology
  • Optometry
  • Pediatric Eye Care

Background:

  • Myopic children often require specific lens additions for near vision.
  • Assessing binocular vision status, including phoria and accommodative response, is crucial for myopia management.
  • Sheard's criterion and null lag of accommodation are two methods for determining appropriate near additions.

Purpose of the Study:

  • To compare personalized near addition values in myopic children using Sheard's criterion versus inducing a null lag of accommodation.
  • To evaluate the impact of lens adaptation on these parameters after near work.

Main Methods:

  • Fifty-three myopic children were tested with various addition lenses.
  • Accommodative response, phoria, and fusional amplitudes were measured before and after 6 minutes of near work.
  • Addition values were determined using Sheard's criterion (FA/Ph ≥ 2) and linear regression for null accommodative lag.

Main Results:

  • Near addition values for Sheard's criterion (+2.16 ± 0.79D) were significantly lower than those for null lag (+2.83 ± 0.44D).
  • Null lag additions resulted in FA/Ph ratios below 2.0 in 75.5% of subjects.
  • Lens adaptation caused a slight increase in accommodative lag and an exophoric shift.

Conclusions:

  • Sheard's criterion provides lower personalized near addition values compared to null lag of accommodation.
  • These lower values are recommended for better binocular vision, particularly in exophoric myopic children.
Abstract

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