What is the abbreviation for phototherapeutic keratectomy?

The abbreviation for phototherapeutic keratectomy is PTK. Phototherapeutic keratectomy is a specialized laser surgery used to treat corneal irregularities and superficial corneal diseases. The "PT" in PTK stands for "photo" and "therapeutic," highlighting the use of laser technology to address medical conditions affecting the cornea.

Understanding the other abbreviations can help clarify why PTK is the correct choice. PKP stands for penetrating keratoplasty, which is a different surgical procedure involving a corneal transplant, while PRK, or photorefractive keratectomy, is focused on correcting refractive errors, not directly treating corneal diseases. LRI refers to limbal relaxing incisions, which is a procedure to correct astigmatism. Each of these procedures has distinct purposes and applications within ophthalmic surgery, but only PTK specifically denotes phototherapeutic keratectomy. Thus, PTK is correctly identified as the abbreviation for that procedure.