[Arc-wedge keratoplasty as a method for correcting astigmatism].

Area of Science:

• Ophthalmology
• Surgical Innovation
• Corneal Surgery

Background:

• Astigmatism correction via optical means shows limited effectiveness, necessitating surgical interventions.
• The development of novel surgical techniques for astigmatism is crucial for improving patient outcomes.
• Mixed and complex myopic astigmatism present significant challenges in refractive correction.

Observation:

• A new surgical technique, arc wedge-keratoplasty, was performed on 19 eyes with mixed and complex myopic astigmatism.
• Pre-operative astigmatism averaged 6.8 +/- 2.11D, reducing to an average of 2.2 +/- 0.18D post-operatively.
• The average refractive effect of the procedure was 4.6D, with changes observed in both main meridians of the cornea.

Findings:

• Arc wedge-keratoplasty demonstrated high effectiveness in correcting astigmatism, with a significant average reduction of 4.6D.
• The surgical procedure is less traumatic than existing methods, involving only two incisions and preserving a central corneal zone.
• Follow-up periods ranged from 6 months to 4 years, indicating sustained efficacy.

Implications:

• Arc wedge-keratoplasty is a viable and recommended surgical option for correcting mixed astigmatism.
• The technique's reduced invasiveness and effectiveness suggest potential for wider application in astigmatism management.
• Further research may explore its application in other forms of astigmatism and long-term outcomes.