Which procedure involves the use of drops to enlarge the pupils?

The procedure that involves the use of drops to enlarge the pupils is known as mydriasis. This process is essential in various eye examinations, allowing the ophthalmologist or eye care professional to obtain a better view of the retina and other structures within the eye. Mydriatic drops are instilled into the eyes to temporarily dilate the pupils, which facilitates a thorough examination and can assist in diagnosing conditions such as retinal detachment, diabetic retinopathy, and other ocular diseases.

In contrast, retinoscopy is a technique used to measure the refractive power of the eye and does not specifically involve pupil dilation. Tonometry measures intraocular pressure and typically does not require pupil dilation as a prerequisite. Fluorescein angiography is a diagnostic procedure that involves capturing images of the retina after a fluorescent dye is injected, and while it may sometimes involve pupil dilation, the primary focus is on imaging rather than the dilation itself. Therefore, mydriasis is the most accurate term for the specific action of using drops to enlarge the pupils, making it the correct choice.