Annals of Optometry and Contact Lens 2015;14(2):95-99.
Published online June 25, 2015.
Effect of Preoperative Visual Acuity on Surgical Outcome in Esotropia
Jae Hoon Lee, Hye Bin Yim
Department of Ophthalmology, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
Received: 4 March 2015   • Revised: 1 June 2015   • Accepted: 1 June 2015
Purpose: To investigate the effect of preoperative visual acuity on surgical outcome in esotropia (ET).
Methods: We analyzed 110 patients who had undergone bimedial rectus recession for ET, and had been followed for more than 6 months between May 2007 and May 2013. Subjects were classified into infantile ET, acquired partially accommodative ET, and nonaccommodative ET groups. Surgical success was defined as ocular alignment within ± 8 prism diopters and stereopsis < 400 s at 6 months. Monocular amblyopia was classified as none, mild, moderate, or severe, according to the acuity difference using Jin’s vision chart. Patients with severe amblyopia, who had undergone unilateral recess/resect procedures, and those with binocular amblyopia were excluded from the study.
Results: No statistically significant difference was evident in the surgical success rates of ocular alignment or stereopsis among the amblyopia subgroups. Of the ET subgroups, a statistically significant decrease in the surgical success rate of ocular alignment and stereopsis was only noted in the infantile ET group with moderate amblyopia.
Conclusions: Preoperative mild amblyopia in infantile and acquired ET does not significantly affect the postoperative motor or sensory outcome. However, moderate amblyopia in infantile ET showed a significantly lower success rate regarding postoperative motor and sensory outcomes. Thus, for patients with infantile ET with moderate amblyopia, it is important to improve the preoperative visual acuity to the level of mild amblyopia via occlusion therapy and refractive error correction.
Ann Optom Contact Lens 2015;14(2):95-99
Key Words: Amblyopia, Esotropia, Stereopsis, Strabismus, Visual acuity

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