Comparison of the Effect of Different Types of Experimental Anisometropia on Stereopsis Measured with Titmus, Randot and TNO Stereotests

Journal of Ophthalmic & Vision Research
Reza NabieSafieh A Aslanzadeh

Abstract

To assess the effect of experimental anisometropia and monovision on stereopsis using the Titmus, Randot, and TNO stereoacuity tests. Sixty adult volunteers were enrolled in the present study. Four different types of anisometropia-myopia, hyperopia, and astigmatism (both 90° and 45°)-were induced by placing trial lenses over the dominant eye (from 3 to 1 D). Stereoacuity was measured using the Titmus, Randot, and TNO tests. In all the anisometropia types, stereopsis deteriorated with increase in anisometropia in the three stereoacuity tests performed (P < 0.001). The largest decrease in stereopsis was attributed to 3 D myopic anisometropia-6.51 ± 2.10, 6.59 ± 2.35, and 7.36 ± 1.89 arc seconds in Titmus circles, Randot circles, and TNO, respectively. Minimal change in stereopsis was observed in 1 D astigmatism of 45°. Any type of anisometropia may reduce stereoacuity; this reduction is most noticeable with myopic anisometropia, especially in the TNO test, probably due to the lack of monocular cues.

References

Aug 25, 2005·Expert Review of Vaccines·Nigel A Cunliffe, Osamu Nakagomi
Jan 3, 2014·Supportive Care in Cancer : Official Journal of the Multinational Association of Supportive Care in Cancer·Kimberly R PorterFaith G Davis

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Citations

Apr 29, 2021·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Silvia BonfantiSilvio Maffioletti
Nov 17, 2021·Neurological Research·Peter SmaakjærRune Skovgaard Rasmussen

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