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Related Experiment Videos

A comparison study of dynamic retinoscopy techniques.

L C Locke1, W Somers

  • 1Walker Eye Clinic, Indiana University School of Optometry, Bloomington.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|August 1, 1989
PubMed
Summary

Monocular estimate method (MEM) and Cross, Nott retinoscopies are interchangeable for assessing accommodative lag in young adults. Bell and Binocular cross cylinder (BCC) techniques showed significant differences from the others.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Dynamic retinoscopy assesses accommodative status, with Monocular Estimate Method (MEM) being the most studied.
  • Alternative techniques are valuable due to examiner preference, patient factors, or equipment limitations.

Purpose of the Study:

  • To compare accommodative lag data obtained using Bell, Cross, Nott retinoscopies, MEM, and Binocular Cross Cylinder (BCC).
  • To evaluate the interchangeability of different dynamic retinoscopy methods in young adults.

Main Methods:

  • Two experienced examiners performed Bell, Cross, Nott retinoscopies, MEM, and BCC on 10 young adult subjects.
  • Statistical analysis was used to compare the obtained accommodative lag measurements.

Main Results:

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  • No significant differences were found between the two examiners' results (p < 0.2672).
  • MEM, Cross, and Nott retinoscopy results were not significantly different from each other.
  • Bell and BCC techniques yielded results significantly different from MEM, Cross, and Nott.

Conclusions:

  • MEM, Cross retinoscopy, and Nott retinoscopy can be used interchangeably for evaluating accommodative lag in young adults.
  • Practitioners have reliable alternative options for assessing accommodation beyond MEM.