A Modified Algorithm-Based Levator Aponeurectomy in Mild to Moderate Congenital Blepharoptosis

Area of Science:

• Ophthalmology
• Surgical Techniques

Background:

• Levator aponeurectomy is a standard surgical procedure for blepharoptosis (droopy eyelid).
• Accurate intraoperative assessment is crucial for successful ptosis correction, especially under local anesthesia.
• Determining the precise amount of levator aponeurosis shortening is challenging for surgeries performed under general anesthesia.

Purpose of the Study:

• To develop a predictive algorithm for levator aponeurosis shortening in blepharoptosis surgery.
• To enhance the accuracy and clinical feasibility of ptosis correction.
• To provide a reliable method for determining surgical adjustments under general anesthesia.

Main Methods:

• A prospective, single-center study involving patients with mild to moderate congenital blepharoptosis.
• Levator aponeurectomy was performed under local anesthesia.
• Preoperative measurements included Marginal Reflex Distance 1 (MRD1) and levator function; intraoperative shortening and postoperative MRD1 were recorded.

Main Results:

• Data from 27 patients (34 eyelids) were analyzed.
• A linear regression model was established: y = -0.2717*x + 5.026, with R² = 0.8553.
• The model correlates levator function (x-axis) with the ratio of levator aponeurosis shortening to MRD1 correction height (y-axis).

Conclusions:

• A modified algorithm accurately predicts levator aponeurosis shortening based on levator function and desired ptosis correction.
• This algorithm offers improved accuracy and clinical feasibility for blepharoptosis surgery.
• The findings provide a valuable tool for surgeons, particularly when general anesthesia precludes intraoperative adjustments.