Background: To provide an amount-response reference for surgical planning in type III acute acquired concomitant esotropia (AACE).
Methods: Consecutive patients who underwent unilateral or bilateral medial rectus recession (MRrec) for AACE or common forms of esotropia (ET) correction from January 2019 to August 2023. All patients with a minimum follow-up of 3 months were analyzed. A pre- and post-surgical healthy eye behavior questionnaire was conducted on patients with AACE.
Results: In this study, we found that preoperative horizontal deviation had a significant effect on the total surgical amount of the patients. When predicting the total surgical amount of AACE patients, the recommended regression equation is Y = 3.259 + 0.174 preoperative horizontal deviation. Additionally, for AACE patients with preoperative horizontal deviation less than 40, the quantified reference formula for the total surgical amount was Y = 1.746 + 0.236 × preoperative horizontal deviation. For AACE patients with preoperative horizontal deviation greater than or equal to 40, the quantified reference formula for the total surgical amount was Y = 4.600 + 0.143 × preoperative horizontal deviation. The results of the questionnaire survey showed that the postoperative eye behaviors of AACE patients haveimproved.
Conclusions: This study conducted a detailed quantitative analysis of the impact of preoperative horizontal deviation levels on the total surgical amount for AACE patients, and established specific quantitative reference formulas to inform surgeons’ surgical planning. In addition, we suggest providing health education to patients after surgery, which can have a positive effect on their postoperative ocular behavior.