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Strong fixation preference in patients with manifest exotropia: Does it matter or not?

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Abstract

Purpose

To evaluate the influence of strong fixation preference on clinical and surgical outcomes, in non-amblyopic patients with basic-type intermittent exotropia (IXT).

Materials and methods

The records of patients were retrospectively investigated. Non-amblyopic patients with the diagnosis of basic-type IXT were enrolled and divided into two groups according to the presence of strong fixation preference (SFP). Best-corrected visual acuity, refractive errors, deviations in near and distance, convergence patterns, motor fusion, stereopsis were evaluated and compared. Patients who underwent surgery in each group composed subgroups and postoperative deviations, convergence patterns, motor fusion, and stereopsis were compared.

Results

Seventy-seven patients were enrolled and divided into two groups according to the presence of SFP: patients with SFP composed Group 1 and patients with alternating fixation composed Group 2. Statistically significant difference was seen between groups in terms of motor fusion (p: 0.02). Other parameters did not differ between groups. Data obtained from patients in subgroups of each group were not statistically different.

Conclusion

The evaluation of basic-type exotropic patients according to their fixation preference revealed us that motor fusion might be affected by strong fixation preference. We also observed that SFP did not affect surgical success rates, convergence patterns, and stereopsis of exotropic patients.

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Funding

This study was not funded by any company.

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Correspondence to Burcin Cakir.

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All authors declare that they have no conflict of interest.

Ethics approval

Prior ethical approval from the Sakarya University Institutional Review Board (IRB: 71522473/050.01.04/170) was taken. The study was performed in adherence to the 1964 Declaration of Helsinki.

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Written informed consent was obtained from each subject or from parents of each subject, in the study.

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Patients or parents of patients signed informed consent regarding publishing their data.

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Cakir, B., Aksoy, N.Ö., Bursalı, Ö. et al. Strong fixation preference in patients with manifest exotropia: Does it matter or not?. Int Ophthalmol 41, 527–532 (2021). https://doi.org/10.1007/s10792-020-01603-1

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  • DOI: https://doi.org/10.1007/s10792-020-01603-1

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