Long-term surgical outcomes of basic-type exotropia in patients with hyperopia

• Published in: BMC ophthalmology Vol. 23; no. 1; p. 187
• Main Authors: Jeon, Hyeshin, Choi, Hee-Young
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 27.04.2023; BioMed Central; BMC
• Subjects: Adolescent; Care and treatment; Child; Child, Preschool; Comparative analysis; Exotropia; Exotropia - surgery; Female; Follow-Up Studies; Humans; Hyperopia; Hyperopia - surgery; Male; Medical prognosis; Medical records; Myopia; Oculomotor Muscles - surgery; Ophthalmologic Surgical Procedures - methods; Ophthalmology; Patient outcomes; Patients; Retrospective Studies; Strabismus; Surgeons; Surgery; Surgical outcomes; Survival analysis; Treatment Outcome; Vision, Binocular; Visual acuity; United States > US; Chicago Illinois; Exotropia; Surgery; Hyperopia
• ISSN: 1471-2415; 1471-2415
• DOI: 10.1186/s12886-023-02909-1

To investigate the surgical outcomes of basic-type exotropia in patients with hyperopia. The medical records of patients who underwent surgery for basic-type exotropia and had been followed up for ≥ 2 years were retrospectively recruited. Patients with myopia and spherical equivalent (SE) < -1.0 diopters (D) were excluded. The patients were classified according to the SE: group H had a SE ≥  + 1.0 D, and group E had -1.0 ≤ SE <  + 1.0 D. The surgical success rate and sensory outcome were compared. Surgical success was defined as exodeviation ≤ 10 prism diopters (PD) and esodeviation ≤ 5 PD at 6 m fixation. Stereoacuity was measured using the Titmus Preschool Stereoacuity Test. Seventy-five patients (24 males and 51 females, mean age 5.1 ± 2.6 years, range 2.7-14.8) were included. The SE ranged from -0.9 to 4.4 and 21 patients were classified into group H and 54 into group E. The success rates were higher in group H than in group E during the entire follow-up period, but the differences were significant only at the final examination. At the final follow-up, 11 of the 21 (52.4%) patients in group H and 15 of the 54 (27.7%) in group E maintained successful alignment, whereas 10 (47.6%) and 38 (70.4%) patients exhibited recurrence. Overcorrection was exhibited in one (1.9%) patient in group E. Sensory results were comparable between the groups. The follow-up period did not differ between the two groups. The survival analysis showed no difference in the surgical results between the two groups. Surgery for basic-type intermittent exotropia resulted in superior outcomes in patients with hyperopia compared to those with emmetropia.