Which term describes the formation of new blood vessels entering the cornea from the limbus?

The term that accurately describes the formation of new blood vessels entering the cornea from the limbus is neovascularization. This process occurs when the cornea becomes ischemic or is otherwise lacking in oxygen, prompting the body to create new blood vessels to supply it with necessary nutrients. Neovascularization can lead to various complications, as the cornea is normally avascular (lacking blood vessels), which is essential for maintaining its transparency and overall health. Increased blood vessel growth can result from conditions such as contact lens overwear, chronic inflammation, or hypoxia. The other terms listed refer to different ocular conditions: keratoconus involves a progressive thinning and bulging of the cornea; corneal edema refers to swelling due to fluid accumulation; and aniridia is characterized by the absence of an iris. These conditions do not relate to the formation of new blood vessels, making neovascularization the correct choice.