On which part of the eye do cycloplegic eye drops work?

Cycloplegic eye drops primarily function on the muscles that control the lens of the eye. These drops work by temporarily paralyzing the ciliary muscles, which are responsible for changing the shape of the lens to allow the eye to focus on objects at various distances. When these muscles are paralyzed, the eye cannot accommodate, or adjust focus, leading to a state of cycloplegia.

Understanding how cycloplegic drops work is important for various eye examinations and treatments. By relaxing the ciliary muscle, healthcare professionals can better assess the eye's refractive state without the interference of accommodation. This is crucial during procedures like refractive assessments and examinations for certain ocular conditions.

In contrast, other parts of the eye mentioned in the options do not respond to cycloplegic drops in the same way. Lashes, the sclera, and the iris do not have the accommodating function that is directly affected by these medications, making the muscles that control the lens the appropriate target for the action of cycloplegic eye drops.