Cyclocryotherapy for glaucoma after penetrating keratoplasty

Area of Science:

• Ophthalmology
• Glaucoma Surgery
• Corneal Transplantation

Background:

• Elevated intraocular pressure (IOP) is a significant complication following penetrating keratoplasty.
• Medically unmanageable IOP can lead to graft failure and vision loss after corneal transplantation.
• Glaucoma surgery after keratoplasty presents unique challenges for graft survival.

Purpose of the Study:

• To evaluate the efficacy and safety of cyclocryotherapy for managing elevated IOP post-penetrating keratoplasty.
• To determine the impact of cyclocryotherapy on corneal graft clarity and visual acuity.
• To compare cyclocryotherapy outcomes with other glaucoma surgical procedures in this context.

Main Methods:

• Thirty-six eyes with medically unmanageable IOP after penetrating keratoplasty were treated with cyclocryotherapy.
• The number of treatment sessions, graft clarity, and visual acuity were recorded.
• Complication rates and timing of procedures relative to corneal transplant were analyzed.

Main Results:

• Glaucoma was controlled in 30 out of 36 eyes with one cyclocryotherapy procedure; five eyes required three procedures.
• Eighty-two percent of corneal grafts remained clear after cyclocryotherapy.
• 19 out of 23 eyes with clear grafts achieved useful visual acuity.
• The overall complication rate was 14%.

Conclusions:

• Cyclocryotherapy is an effective treatment for elevated intraocular pressure following penetrating keratoplasty.
• The procedure demonstrates a high rate of graft clarity and visual recovery, outperforming other glaucoma surgeries in this setting.
• Cyclocryotherapy is essential for preventing graft failure and achieving satisfactory visual outcomes in patients with glaucoma after corneal transplantation.