Distance Stereopsis in Patients with Accommodative Esotropia
Sibel Oto, MD; Gulsah Gokgoz, MD; Almila Sarigul Sezenoz, MD; Sezin Akca Bayar, MD
Baskent University School of Medicine
Introduction: To investigate the factors associated with distance stereopsis (DS) in patients with accommodative esotropia.
Methods: Medical records of patients with accommodative esotropia from July 2013 to July 2016, with a follow up period >/= 1 year were reviewed.Patients with a residual deviation of >/=4PD were excluded. Near and distance angle of deviation with and without correction, cycloplegic refractive error, presence of anisometropia and amblyopia, contoured and uncontoured near stereopsis were evaluated as prognostic factors.
Results: A total of 55 patients were included (mean age 9.55±4.15 years), 35 patients had distance stereopsis. Mean corrected distance deviation was 0.91±0.5 PD (0-3.9 PD). All DS(+) patients also attained uncontoured near stereopsis (UNS). UNS was present in 9 patients in the DS(-) group, and the difference was significant (p=0.001). Anisometropia (p=0858), uncorrected near deviation (p=0.407), distance deviation (p=0.205), spherical equivalent in right (p=0.061) and left (p=0.306) eyes were not significantly different between the DS(+) and DS(-) groups. Spearman correlation analysis showed significant positive correlation between UNS and DS (r=0.588, p<0.001). When DS(+) patients were classified as 60-100 secs arc (n=21) and 200-400 secs arc (n=14) stereoacuity, contoured stereopsis outcome was significantly different between the DS(-) and the 60-100 secs arc groups (p=0.001).
Discussion: All patients displayed a range of contoured stereopsis and 80% had uncontoured near stereopsis. Distance stereoacuity was present in 63.6 % of the study patients and showed strong correlation with near stereopsis.
Conclusion: Prognostic factors other than near stereopsis were not significant for distance stereopsis outcome in accommodative esotropia.
References: 1. Fawcett S, Leffler J, Birch EE. Factors influencing stereoacuity in accommodative esotropia. J AAPOS 2000;4:15-20
2. Birch EE, Jingyun W. Stereoacuity outcomes after treatment of infantile and accommodative esotropia. Optom Vis Sci 2009;86:647-652
3.Lee HJ, Kim SJ, Yu YS. Stereopsis in patients with refractive accommodative esotropia. J AAPOS 2017;21:190-195