What procedure would you perform to inspect the underside of the eyelid?

Eyelid eversion is the appropriate procedure for inspecting the underside of the eyelid. This technique involves turning the eyelid inside out, which allows for a thorough examination of the conjunctival surface, revealing any abnormalities or foreign bodies that may be present. It is particularly useful in assessing conditions such as conjunctivitis or other irritations that might not be visible from the outer surface of the eyelid.

Pupil dilation, fundoscopy, and tonometry serve different purposes in eye examinations. Pupil dilation is primarily used to expand the pupil for better visualization of the interior structures of the eye, including the retina and optic nerve. Fundoscopy involves examining the back of the eye (retina) through the pupil, while tonometry measures intraocular pressure to screen for glaucoma. None of these techniques would provide a view of the underside of the eyelid, thereby making eyelid eversion the specific and correct choice for that purpose.