The cornea is the transparent front part of the eye that transmits and focuses light. About 40,000 cornea transplants are performed in the US each year, with a 90% success rate. Candidates are screened for infections or health risks and may be disqualified for certain conditions. The transplant procedure takes 1-2 hours and costs around $7,500. Post-surgery therapy includes eye drops, pills, and activity restrictions for healing.