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Refractive keratoplasty for post-graft astigmatism
G Whitehouse1, G Sutton, M A Lawless
1Sydney Refractive Surgery Centre, St Leonards, NSW.
Australian and New Zealand Journal of Ophthalmology
|November 1, 1994
Summary
This study modified relaxing incisions with compression sutures to treat high post-keratoplasty astigmatism. The technique significantly reduced astigmatism, improving patient vision and function.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Refractive Surgery
Background:
- High post-keratoplasty astigmatism presents a significant challenge in visual rehabilitation.
- Existing surgical techniques may have limitations in effectively correcting severe astigmatism after corneal transplantation.
Purpose of the Study:
- To evaluate the efficacy of modified relaxing incisions with compression sutures for correcting high post-keratoplasty astigmatism.
- To assess the functional improvement and safety profile of this surgical modification.
Main Methods:
- Refractive keratoplasty with modified relaxing incisions and compression sutures was performed on 33 patients.
- The modification involved undercutting the relaxing incisions to enhance their effectiveness.
- Keratometric astigmatism was measured preoperatively and postoperatively.
Main Results:
- A mean reduction of 8.38 dioptres in keratometric astigmatism was achieved (from 12.21 to 3.93 dioptres).
- All patients reported marked functional visual improvement.
- Two patients required reoperation, and one needed resuturing, indicating a good safety profile.
Conclusions:
- Modified relaxing incisions with compression sutures are effective in treating high post-keratoplasty astigmatism.
- The undercutting modification expands the range of treatable astigmatism with this technique.
- The procedure offers significant functional improvement for patients with challenging corneal conditions.