Corneal transplant in Cairo, Egypt, generally runs $2,500-$4,500 per eye all-inclusive, while packages advertised on Turkey-focused medical-tourism sites typically run $3,500-$8,000. Both are well below the roughly $23,000 average cited for the US, and both draw international patients for the same reason, lower operating costs, not lower clinical standards. This page lays out the actual numbers, surgeon training, language support, and logistics side by side so you can weigh them against your own case.
We haven't visited or vetted specific clinics in Turkey, the figures below come from published medical-tourism aggregator listings, cited in the references section. Get a written, itemized quote from any clinic you're considering, wherever it is, before comparing on price alone.