Monocular visual acuity measured with the OccluPad binocular vision test in patients with unilateral functional visual loss

  • Yo IwataEmail author
  • Tomoya Handa
  • Hitoshi Ishikawa
Short Note


This study used two different testing methods to examine vision in pediatric patients suspected of unilateral functional vision loss. Monocular vision in the affected eye was measured using both standard visual acuity testing methods and OccluPad-aided testing; the latter allows testing of visual acuity in a single eye under both-eyes-open condition. Visual acuity in the affected eye measured using the OccluPad was better than that measured using conventional methods. Additionally, the 24 included patients exhibited visual acuity of at least 20/20. Therefore, the OccluPad-aided visual acuity measurements may be more representative of the true visual acuity than the standard chart visual acuity measurements.


Binocular vision OccluPad Unilateral functional visual loss Visual acuity test 



No funds were used in the conduct or completion of this work.

Compliance with ethical standards

Conflict of interest

No author has any proprietary or financial interest in any of the materials or methods discussed.

Supplementary material

10043_2019_494_MOESM1_ESM.xlsx (11 kb)
Supplementary material 1 (XLSX 10 KB)


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Copyright information

© The Optical Society of Japan 2019

Authors and Affiliations

  1. 1.Doctor’s Program of Medical ScienceKitasato University Graduate SchoolSagamiharaJapan
  2. 2.Department of Rehabilitation, Orthoptics and Visual Science Course, School of Allied Health SciencesKitasato UniversitySagamiharaJapan
  3. 3.Department of Ophthalmology, School of MedicineKitasato UniversitySagamiharaJapan

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