Post-penetrating keratoplasty astigmatism.

Area of Science:

• Ophthalmology
• Corneal Surgery
• Refractive Errors

Background:

• Postoperative astigmatism frequently impacts visual acuity following penetrating keratoplasty.
• Etiology involves host, donor, and surgical factors, often leading to suboptimal vision.
• While pre-operative and intra-operative measures can mitigate astigmatism, correction is frequently necessary.

Purpose of the Study:

• To review the causes of postoperative astigmatism after corneal transplantation.
• To discuss the management strategies for correcting astigmatism post-keratoplasty.
• To outline the available surgical options when conservative methods fail.

Main Methods:

• Literature review of causes and management of post-keratoplasty astigmatism.
• Discussion of surgical interventions including astigmatic keratotomy, compression sutures, toric IOLs, and laser procedures.
• Consideration of repeat keratoplasty as a final treatment option.

Main Results:

• Postoperative astigmatism is a significant complication affecting visual outcomes.
• Various surgical techniques exist for correction when spectacles and contact lenses are insufficient.
• Repeat keratoplasty remains a last resort for refractory cases.

Conclusions:

• Effective management of postoperative astigmatism is crucial for successful penetrating keratoplasty.
• A stepwise approach, from conservative to surgical interventions, guides treatment decisions.
• Understanding the causes and available treatments optimizes visual rehabilitation after corneal transplantation.