What are the three components of the near reflex triad?

The near reflex triad consists of three coordinated responses that occur when focusing on a close object: convergence, accommodation, and miosis.

Convergence refers to the inward movement of both eyes toward each other, allowing for single binocular vision of a near object. This is crucial for depth perception and ensuring that both eyes are aligned properly to focus on an object at a close distance.

Accommodation is the process by which the lens of the eye changes shape to increase its optical power, allowing for clear focus on near objects. The ciliary muscles contract, causing the lens to become more rounded and thus increase its curvature, enhancing its ability to refract light.

Miosis is the constriction of the pupils, which helps improve the depth of field and reduces the amount of light entering the eye, aiding in better focus on nearby objects.

Collectively, these three components work in synchrony to enhance visual acuity at near distances, making the correct choice (convergence, accommodation, miosis) a fundamental concept in understanding the near reflex response in ocular physiology.