Refractive keratoplasty: myopic keratomileusis in baboons

Area of Science:

• Ophthalmology
• Veterinary Science
• Surgical Innovation

Background:

• Myopic keratomileusis is a refractive surgical procedure to correct myopia.
• Evaluating surgical techniques in animal models is crucial for clinical translation.
• The baboon model offers physiological similarities to humans for ophthalmic research.

Purpose of the Study:

• To assess the efficacy and safety of myopic keratomileusis in a baboon model.
• To determine the refractive correction achievable using established clinical techniques.
• To evaluate the baboon model's suitability for future refractive surgery studies.

Main Methods:

• Eight myopic keratomileusis procedures were performed on baboons (Papio cynocephalus).
• Standard surgical instruments and clinical techniques were employed.
• Postoperative follow-up included morphological analysis and refractive assessment for 2.5 to 6 months.

Main Results:

• A mean keratometric correction of 5.5 diopters (range 2.4-8.4) was achieved in 6 of 8 eyes.
• No intraoperative or postoperative technical complications were observed.
• Morphological analysis revealed subclinical Bowman's membrane breaks and keratocyte repopulation in most specimens.

Conclusions:

• The baboon model is an excellent platform for evaluating myopic keratomileusis.
• Variations in corneal thickness may explain undercorrections observed.
• The surgical technique demonstrated safety and feasibility in this animal model.