Which of the following is NOT considered an allowable corneal refractive surgery in army aviation?

In the context of army aviation and its medical standards, specific types of corneal refractive surgeries are recognized as permissible based on their safety and effectiveness for pilots. LASIK (Laser-Assisted In Situ Keratomileusis), LASEK (Laser Epithelial Keratomileusis), and PRK (Photorefractive Keratectomy) are all forms of corneal refractive surgeries that reshape the cornea to correct vision issues like myopia, hyperopia, and astigmatism. These procedures have been studied extensively and have shown consistently positive outcomes, making them suitable for individuals in high-stakes environments such as aviation, where optimal vision is crucial.

On the other hand, intraocular lens surgery, often referred to in the context of cataract surgery or lens replacement, involves placing a lens inside the eye to correct vision rather than reshaping the cornea. This type of surgery is not typically classified alongside corneal refractive surgeries and presents different risks and considerations that may not align with the rigorous medical standards set for army aviation personnel. Consequently, intraocular lens surgery is not viewed as allowable in the same way as the corneal procedures mentioned, which is why it is the correct answer to the question.