Which condition is correctly paired with a precaution against the use of N2O?

The pairing of recent eye surgery with a precaution against the use of nitrous oxide (N2O) is significant due to the potential risks associated with intraocular pressure. After eye surgery, particularly procedures involving the lens or retina, there is an increased concern about maintaining stable intraocular pressure to prevent complications such as retinal detachment or hemorrhage. Nitrous oxide can expand in closed spaces, including the eye, and could potentially exacerbate any elevations in intraocular pressure that could occur post-surgery.

While the other conditions listed—Type 1 diabetes, terminal illness, and hypertension—may require consideration in a dental context, they do not present the same immediate and specific precautionary concern regarding the direct effects of nitrous oxide on surgical recovery as recent eye surgery does. For instance, diabetes may impact healing and could influence anesthetic considerations, but it does not specifically heighten the risks associated with N2O usage like the post-operative state of the eye does. Similarly, terminal illness or hypertension also warrant careful monitoring, yet neither has the same direct association with the complications linked to nitrous oxide after eye surgery.