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Scientific papers

Limits and possibilities of the Lang-Stereotest

  • Authors: S. Entacher, R.E. Resch
  • Year of publication: 2021

Development of stereo vision in young infants

Interesting experimental study from the University of Fribourg, Switzerland, on the visual processing of stereo stimuli in infants aged 4 and 7 months, using stereograms of the Lang stereopad.

  • Authors: Infancy, Volume 25, Issue 6 November/December 2020 Pages 781-796
  • Authors: Martina Röthlisberger, Andrea Frick
  • Year of publication: 2020

Comparative analysis of the Lang-Stereopad in a non-clinic population

First internationally published evaluation study of the new Lang-Stereopad in normal vision subjects, comparing TNO, Frisby, and Lang Stereotest II.

  • Authors: VISION research group, University of Liverpool UK in Strabismus 2019
  • Authors: Fiona J. Rowe, Lauren R. Hepworth, Claire Howard, Chung Shen Chean & Meera Mistry
  • Year of publication: 2019

Video Game Vision Syndrome: A New Clinical Picture in Children?

Interesting study from Italy that demonstrated temporary losses of random dot stereopsis on the Lang stereotest I in children who spend particularly long hours playing video games on mobile phones and tablet computers.

  • Authors: Journal of Pediatric Ophthalmology & Strabismus • Vol. 54, No. 6, 2017
  • Authors: C.Rechichi, G.De Mojà, P.Aragona
  • Year of publication: 2017

Statistical Evaluation in Pediatric Patient of LANG-STEREOTEST I for the Diagnosis of Microesotropia in Daily Practice

  • Authors: Poster
  • Authors: D. Allegrini, M. Spera-Orth, L. Rossetti, L. Ottobelli, A.C.Piantanida
  • Year of publication: 2016

Stereo tests as a screening tool for strabismus: which is the best choice?

The Lang stereotest I was the one with the highest sensitivity, specificity, positive predictive value and negative predictive value in comparison with the Lang stereotest II, Titmus test and TNO test.

  • Authors: Clinical Ophthalmology 2014:8 2221–2227
  • Authors: Ch.Ancona, M.Stoppani, V.Odazio, C.La Spina, G.Corradetti, F. Bandello
  • Year of publication: 2014

Statistical evaluation in pediatric patients of the new Lang Stereopad test: a preliminary report. Free paper at ESA Congress Helsinki 2019 June 6th

  • Authors: Investigative Ophthalmology & Visual Science June 2013, Vol.54, 5678. doi:
  • Authors: Free Arvo annual meeting abstract
  • Authors: A.C. Piantanida M.D., M. Spera Orth., Nobili R. Orth., G. Gerosa Orth. and Tranquillini M. Orth. C.O.L. C, Cernobbio (Como), Italy.
  • Year of publication: 2013

Stereopsis: back in the spotlight

Good overview of the topic of stereo vision, given the increase in 3D media (TV, cinema).

  • Authors: Revue Medicale Suisse ISSN: 1660-9379
  • Authors: Revue Médicale Suisse – www.revmed.ch – 18 janvier 2012
  • Author: Pierre-François Kaeser Georges Klainguti
  • Year of publication: 2012

Testability of Refraction, Stereopsis, and Other Ocular Measures in Preschool Children: the Sydney Paediatric Eye Disease Study.

Large Australian comparative study on the use of common stereotests in young children, in which the highest testability was determined for the Lang-Stereotest II: the vast majority of children could be examined with it thanks to the absence of glasses.

  • Authors: J AAPOS . 2012 Apr;16(2):185-92. doi: 10.1016/j.jaapos.2011.09.017
  • Authors: AS Pai, KA Rose, C. Samarawickrama, R. Fotedar, G. Burlutsky, R. Varma, P. Mitchell
  • Year of publication: 2012

Early detection of small-angle strabismus using the PlusoptiX S04 handheld video refractometer.

  • Authors: PDF LMU Ludwigs-Maximilian-Universität München
  • Authors: Ludwig-Maximilians-Universität München
  • Author: Silke Kirchhoff
  • Year of publication: 2011

Binocular Sensory Status and Miscellaneous Tests

  • Author: Optician
  • Year of publication: 2011

History of Strabismology

Highly recommended online publication of the work History of Strabismus by G. von Noorden. Chapter 2: History of Strabismus in Europe, by J. Lang, from page 72.

  • Authors: Translated to English by Gunther K. Noorden
  • Authors: J.-P. Wayenborgh
  • Authors: Hans Remky, Joseph Lang, Eugene M. Helveston, Alberto Brown-Limon, Emma Limon de Brown, Gill Roper Hall, Henderson Celestino de Almeida, Geraldo de Barros, Bill Gillies, Shinobu Awaya, Yoshimasa Watanabe, Gunter K. von Noorden
  • Year of publication: 2002

Assessment of Adult Stereopsis Using the Lang 1 Stereotest: A Pilot Study

  • Authors: S. Brown, L. Weih, N. Mukesh, C. McCarty, H. Taylor
  • Year of publication: 2001

The Congenital Strabismus Syndrome

Abstract of a congress contribution, published in Symposium Proceedings Part II

  • Authors: Strabismus - 2000 Vol. 8, No.3, pp 195-199
  • Author: J. Lang
  • Year of publication: 2000

An Efficient Treatment and New Criteria for Cure of Strabismic Amblyopia: Reading and Bangerter Foils

  • Author: J. Lang
  • Year of publication: 1999

Pathophysiology of Binocular Vision and Amblyopia

  • Author: J. Lang
  • Year of publication: 1993

Eye Screening with the Lang Stereotest

Contribution to a symposium of the Joint Meeting of the American Orthoptic Council and the American Association of Certified Orthoptists. First presentation of the Lang stereo test to an American audience of orthoptists.

  • Authors: Veröffentlichttest
  • Authors: HerausgeberTest
  • Author: J. Lang
  • Year of publication: 1987

The Two-Pencil Test for Stereoscopic vision

The Two-Pencil Test of Lang is a method of comparing binocular and monocular stereo

  • Authors: Klin Monbl Augenheilkd 1983; 182(6): 576-581
  • Authors: © 1983 F. Enke Verlag Stuttgart
  • Author: J. Lang
  • Year of publication: 1983

Downloads for distribution and press

Product photos for download

Lang Fixation Cube

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (50 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023

Lang fixation sticks

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (29 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023

Lang-Stereopad®

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (73 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023

Lang-Stereotest® I (old version)

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (82 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023

Lang-Stereotest® II-R

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (57 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023

Lang-Stereotest® II (old version)

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (45 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023

Lang-Stereotest® I-R

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (60 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023

Sets of several products from Lang-Stereotest

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (126 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023

Magnetic support for Lang-Stereopad®

Product photos for free use by the press, authors of scientific articles, sales partners and shop owners.

  • Authors: JPG, transparent PNG (28 MB)
  • Authors: Lang Stereotest AG
  • Author: Frédéric Lourme
  • Year of publication: 2023


Instruction manuals


LANG-STEREOTEST® I-R

LANG-STEREOTEST® II-R

LANG STEREOPAD®

LANG fixation cube white/red

LANG fixation sticks

LANG-STEREOTEST® I (first edition until 2020)

LANG-STEREOTEST® II (first edition)

News from Lang-Stereotest AG

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