Lower Eyelid Reconstruction: A New Classification Incorporating the Vertical Dimension

Area of Science:

• Ophthalmology
• Plastic Surgery

Background:

• Traditional lower eyelid defect classification relies on depth and width.
• Existing methods lack precision in predicting functional and aesthetic outcomes.

Purpose of the Study:

• To introduce a novel classification system for lower eyelid defects.
• To incorporate the vertical component for enhanced outcome prediction in reconstruction.

Main Methods:

• Retrospective review of 34 lower eyelid reconstructions by a single surgeon.
• Classification into four types based on vertical defect extent (pretarsal, preseptal, eyelid-cheek junction, complex).
• Analysis of marginal reflex distance-2 and aesthetic scores, compared using ANOVA and ANCOVA.

Main Results:

• Complex pretarsal/preseptal defects (Type IV) showed the highest postoperative retraction (75%).
• Type IV defects had significantly greater changes in marginal reflex distance-2 and poorer aesthetic scores.
• Type IV patients required significantly more revision surgeries (mean 5.5).

Conclusions:

• Vertical defect dimension is a critical factor in lower eyelid reconstruction.
• The proposed classification system, including vertical assessment, aids surgical planning.
• This new system offers improved prediction of functional and aesthetic results post-reconstruction.