The document discusses the autonomic responses of the eye to adrenergic and cholinergic signals. In normal relaxed state, the ciliary muscle is relaxed and the lens is flattened for distant vision. During accommodation for near vision, the ciliary muscle contracts due to cholinergic signals, reducing tension on the suspensory ligaments and rounding the lens. The document also mentions acetylcholine, nitric oxide, and adrenaline mediators but does not provide details on their specific roles.

1. INTRODUCTION TO AUTONOMIC PHARMACOLOGY: Part V Actions of autonomic nerves: Adrenergic and cholinergic responses

2. Summary of Adrenergic and Cholinergic Responses

4. Normal: Ciliary Muscle Relaxed Suspensory Ligaments Under Tension Lens is Flattened Focus on Distant Objects Accommodation: Ciliary Muscle Contracts Reduced Tension on Suspensory Ligaments Lens becomes Round Focus on Near Objects

5. Summary of Adrenergic and Cholinergic Responses

6. Summary of Adrenergic and Cholinergic Responses

7. Summary of Adrenergic and Cholinergic Responses

8. EDRF Injected Ach M EDRF (NO)