Biomechanical changes and effect on different corneal wound healing in rabbits: A comparative study

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Materials Science

Background:

• Corneal wound healing involves complex biomechanical changes.
• Understanding these changes is crucial for optimizing surgical techniques and patient recovery.
• Wound characteristics like orientation, length, and suture style significantly impact healing.

Purpose of the Study:

• To investigate biomechanical alterations during corneal wound healing.
• To evaluate the influence of wound orientation, length, and suture style on corneal biomechanics.
• To provide insights for improving corneal surgical strategies and postoperative assessments.

Main Methods:

• Rabbit corneal wound models were created with varying directions, lengths, and suture densities.
• Uniaxial tensile testing was performed on corneal specimens at different time points.
• Key biomechanical parameters including low- and high-strain tangent modulus and tensile strength were analyzed.

Main Results:

• No significant differences in low-strain tangent modulus were found between eyes.
• Wounds showed reduced high-strain tangent modulus and tensile strength compared to unwounded corneas.
• Vertical incisions, shorter wound lengths (3mm), and high-density sutures resulted in superior biomechanical recovery.

Conclusions:

• Corneal anisotropy dictates biomechanical properties, affecting healing quality, speed, and stability.
• Incision orientation, length, and suture density are critical factors in corneal wound healing.
• Findings offer valuable insights for surgical planning and post-operative evaluation, though larger studies are recommended.