Measurement of distance objective visual acuity with the computerized optokinetic nystagmus test in patients with ocular diseases

  • Sang Beom Han
  • Eun Ryung Han
  • Joon Young Hyon
  • Jong-Mo Seo
  • Jin Hak Lee
  • Jeong-Min HwangEmail author



To evaluate the efficacy of a computerized optokinetic nystagmus (OKN) test for determination of objective visual acuity (VA) at distance in patients with various ocular diseases.


This is a prospective, non-interventional study that included 85 eyes of 71 patients with one or more ocular pathologies. Study patients were classified into group C (39 eyes of 30 patients with central visual damage), group P (24 eyes of 20 patients with peripheral visual defect) and group M (22 eyes of 21 patients with media opacity). Objective distance VA was measured with OKN induction and suppression methods, and the correlation between the objective and subjective VA at distance was evaluated using linear regression analysis. Mean subjective VAs were compared among each objective VA step and among the three groups.


Significant correlation was found between subjective distance VA and objective VA determined by both OKN induction and suppression methods in all three groups and in overall patients. In overall patients, the mean subjective VA was significantly different in several objective VA steps (Welch’s ANOVA, p < 0.001 for induction and suppression methods). No significant difference in subjective VA among the three groups was found in any objective VA step.


Our objective VA test using OKN induction and suppression methods can be useful in estimating distance VA in patients with various ocular diseases.


Objective visual acuity Optokinetic nystagmus Visual acuity 



All authors had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. This work was supported by Grant A080299 from the Korea Health 21 R&D Project, Ministry of Health, Welfare, and Family Affairs, Republic of Korea.

Financial Disclosure


Conflict of Interest


Supplementary material

417_2011_1705_MOESM1_ESM.doc (29 kb)
ESM 1 (DOC 29 kb)


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Sang Beom Han
    • 1
  • Eun Ryung Han
    • 1
    • 2
  • Joon Young Hyon
    • 1
  • Jong-Mo Seo
    • 3
  • Jin Hak Lee
    • 1
  • Jeong-Min Hwang
    • 1
    Email author
  1. 1.Department of OphthalmologySeoul National University College of Medicine, Seoul National University Bundang HospitalSeongnamKorea
  2. 2.Myungdong St. Mary’s Eye CenterSeoulKorea
  3. 3.School of Electrical EngineeringSeoul National UniversitySeoulKorea

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