Manufacturer changes lead to clinically important differences between two editions of the TNO stereotest

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
Louise L A van DoornMarten F Fortuin

Abstract

Stereoacuity tests used in clinical practice should be repeatable and reproducible. However, it has been observed in a clinical setting that new editions of the TNO stereotest appear to give different values from those obtained using previous versions. The purpose of the present research was to investigate this observation. One hundred and twenty-one Dutch subjects, 88 (73%) females and 33 (27%) males, with an average age of 34.0 years (range 18-55) had their stereoacuity measured using two different versions of the TNO stereoacuity test (TNO 13 and TNO 15). The TNO was tested in a counterbalanced order so that consecutive subjects started with alternate editions to avoid bias. There was a significant difference (p < 0.001) between the median value for stereoacuity measured with TNO 13 (30 s of arc) and TNO 15 (60 s of arc). The bias between the two test versions was -0.23 Log arcseconds (95% limits of the differences: 0.15 to -0.60 Log arcseconds). This study reveals that results obtained with two different editions of a commonplace stereoacuity test are not comparable. New versions come on the market at regular intervals and the assumption that they will give the same results as previous versions may not be valid. Besides the...Continue Reading

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Dec 3, 2014·Journal of Optometry·Laura MongerPeter Allen
Mar 5, 2014·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Arthur BradleyKathryn J Saunders
Apr 27, 2016·BMC Ophthalmology·Huang WuYunfeng Chi
Sep 17, 2016·Journal of Ophthalmology·Yo IwataHitoshi Ishikawa
Dec 9, 2016·Strabismus·Marianne E F PianoAnna R O'Connor
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Nov 30, 2019·Journal of Ophthalmology·Yanhui Yang, Huang Wu
Apr 25, 2019·The British and Irish Orthoptic Journal·Aishat Ateiza, Helen Davis

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