The document discusses corneal transplant, which involves replacing a damaged cornea with a healthy donor cornea. It describes how corneal transplant can restore vision for those with conditions like edema, dystrophy, or keratoconus. The process involves removing the damaged cornea and suturing in a donor cornea. Success rates for corneal transplant are high at around 93% after one year. However, there are limitations like potential rejection and a shortage of donor corneas.