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Related Experiment Video

Updated: Oct 1, 2025

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
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Developing dynamic defocus curve for evaluating dynamic vision accommodative function.

Tingyi Wu1,2, Yuexin Wang1,2, Shanshan Wei1,2

  • 1Department of Ophthalmology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, P.R. China.

BMC Ophthalmology
|March 6, 2022
PubMed
Summary
This summary is machine-generated.

Dynamic visual acuity (DVA) worsens with defocus, similar to static visual acuity. Corrected dynamic vision accommodation (CDVAc) effectively assesses dynamic vision function, with the dynamic defocus curve proving useful for evaluating visual performance.

Keywords:
AccommodationCorrected dynamic vision accommodationDynamic defocus curve testDynamic visual acuity

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Dynamic visual acuity (DVA) assessment is crucial for understanding visual performance under varying conditions.
  • Defocus significantly impacts visual acuity, necessitating investigation into its effects on dynamic vision.

Purpose of the Study:

  • To evaluate dynamic visual acuity (DVA) across different levels of optical defocus.
  • To explore the utility of corrected dynamic vision accommodation (CDVAc) for assessing dynamic visual function.

Main Methods:

  • Twenty young adults underwent comprehensive refractive and accommodative testing.
  • Dynamic visual acuity (DVA) and static visual acuity (SVA) were measured under induced defocus conditions (-4D to +1.5D).
  • Dynamic and static defocus curves were generated, and corrected dynamic vision accommodation (CDVAc) was calculated.

Main Results:

  • DVA significantly decreased compared to SVA across all defocus levels, with a more pronounced effect at higher dioptric values.
  • The dynamic defocus curve exhibited a cubic fit, and DVA correlated with accommodative parameters like positive relative accommodation (PRA) and negative relative accommodation minus positive relative accommodation (NRA-PRA).
  • Corrected dynamic vision accommodation (CDVAc) and static visual acuity (SVA) were identified as significant factors influencing DVA under defocus.

Conclusions:

  • Dynamic visual acuity (DVA) demonstrates a defocus curve comparable to static visual acuity (SVA).
  • Corrected dynamic vision accommodation (CDVAc) provides a feasible method for assessing dynamic accommodative function.
  • The dynamic defocus curve test is an efficient tool for evaluating dynamic visual performance under various defocus conditions.