During an ophthalmic examination, a patient is given eye drops containing atropine, a competitive antagonist of muscarinic acetylcholine receptors.
Using the diagram above, which of the following correctly describes the state of the ciliary muscles, the suspensory ligaments, and the lens following the administration of this drug?
Ciliary muscles contract, suspensory ligaments become slack, and the lens becomes thick (more rounded).
Ciliary muscles contract, suspensory ligaments become tight, and the lens becomes thin (flattened).
Ciliary muscles relax, suspensory ligaments become tight, and the lens becomes thin (flattened).
Ciliary muscles relax, suspensory ligaments become slack, and the lens becomes thick (more rounded).