Mydriacyl, generically known as Tropicamide, is a medication commonly used in the field of ophthalmology. It is an anticholinergic agent that works by relaxing the muscles in the eye to dilate (widen) the pupil. This dilation is essential for allowing eye care professionals to thoroughly examine the interior structures of the eye, such as the lens, retina, and optic nerve, which is crucial for diagnosing conditions like glaucoma, cataracts, and retinal disorders. Mydriacyl is administered as eye drops and its effects typically begin within minutes, lasting for several hours. Due to its action, patients are often advised to protect their eyes from bright light following administration, as the dilated pupils can make eyes more light-sensitive.