Hoya Eyegenius®: New Method for Measuring and Correcting Fixation Disparity

Open access


Many things interfere with good binocular vision in nowadays modern digital environment: long periods spent looking at screens and switching between different digital devices at short distances. Vision-related or asthenopic complaints such as headaches, tired and burning eyes or blurred vision can be experienced by many people. Prescribing prismatic correction for fixation disparity can help to reduce these symptoms. A new, highly innovative method for measuring and correcting fixation disparity has been developed - HOYA EyeGenius®. The HOYA EyeGenius® method includes the unique examination procedures, pre-tests and fixation disparity measurements at far and near distances. The pre-tests allow to include patients with asthenopic complaints only with normal binocular vision and exclude cases with abnormal binocular vision. The main innovation of EyeGenius is based on direct conversion of the fixation disparity value into a prism amount. Therefore, the trial prismatic lenses are not used during the test. The use of digital devices makes this method interactive and minimizes the influence of the examiner.

Cooper, J. (1992). Clinical implications of vergence adaptation. Optom. Vision Sci., 69 (4), 300-307.

Duane, A. (1897). A New Classification of the Motor Anomalies of the Eye: Based Upon Physiological Principles, Together With Their Symptoms, Diagnosis, and Treatment. Vail, J. H., New York. 116 pp.

Günthert, K. (1980). Heterophorien im Spiegel der Statistik. Der Augenoptiker, 12, 8-15.

Haase, H.-J. (1962). Binocular testing and distance correction with the Berlin Polatest (Translated by Baldwin W. R.). J. Amer. Optom. Assoc., 34, 115-125.

Jenkins, T. C., Abd-Manan, F., Pardhan, S., Murgatroyd, R. N. (1994). Effect of fixation disparity on distance binocular visual acuity. Ophthalm. Physiol. Optics, 14 (2), 129-131.

Jenkins, T. C., Pickwell, L. D., Yekta, A. A. (1989). Criteria for decompensation in binocular vision. Ophthalm. Physiol. Optics, 9 (2), 121-125.

London, R., Crelier, R. S. (2006). Fixation disparity analysis: sensory and motor approaches. Optometry, 77 (12), 590-608.

Maddox, E. E. (1893). The Clinical Use of Prisms; and the Decentering of Lenses, 2nd edition. John Wright & Sons, Bristol, England. 170 pp.

Mallett, R. F. J. (1964). The investigation of heterophoria at near and a new fixation disparity technique. The Optician, 148 (3844/3845), 547-551, 574-581.

Methling, D., Jaschinski, W. (1996). Contrast sensitivity after wearing prisms to correct for heterophoria. Ophthalm. Physiol. Optics, 16 (3), 211-215.

Montés-Micó, R. (2001). Prevalence of general dysfunctions in binocular vision. Ann. Ophthalm., 33 (3), 205-208.

O'Leary, C. I., Evans, B. J. (2006). Double-masked randomised placebo- controlled trial of the effect of prismatic corrections on rate of reading and the relationship with symptoms. Ophthalm. Physiol. Optics, 26 (6), 555-565.

Rosenfield, M. (2011). Computer vision syndrome: a review of ocular causes and potential treatments. Ophthalm. Physiol. Optics, 31 (5), 502-515.

Schmitz, S. (1998). Kundenbefragung zur Mess- und Korrektionsmethodik nach H. J. Haase (MKH). Deutsche Optikerzeitung, (DOZ), 5, 16-17.

Schroth, V. (1998). Erfolgsbeobachtung: Prismenkorrektion bei Kindern, die nicht freiwillig lesen. Neues Optikerjournal, (NOJ), 10, 21-22.

Schroth, V., Joos, R., Jaschinski, W. (2015). Effects of prism eyeglasses on objective and subjective fixation disparity. PLoS One, 10 (10), e0138871.

Sheedy, J. E., Saladin, J. J. (1978). Association of symptoms with measures of oculomotor deficiencies. Amer. J. Optom. Physiol. Optics, 55 (10) 670-676.

Yan, Z., Hu, L., Chen, H., Lu, F. (2007). Computer Vision Syndrome: A widely spreading but largely unknown epidemic among computer users. Comput. Hum. Behav., 24 (5), 2026-2042.

Journal Information

CiteScore 2017: 0.22

SCImago Journal Rank (SJR) 2017: 0.127
Source Normalized Impact per Paper (SNIP) 2017: 0.211


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 381 377 24
PDF Downloads 224 224 13