Question

What are the types of accommodation?

Hint:

Reflex accommodation is the most common type and is crucial for daily activities like reading and viewing nearby objects.

Answer 1

Step 1: Types of Accommodation.
There are two primary types of accommodation:

1. tonic accommodation:
Tonic accommodation is the baseline level of accommodation in the eye, which is maintained when the eye is at rest and looking at an object at a far distance. This level of accommodation is minimal and does not require active effort from the ciliary muscles.

2. reflex accommodation:
Reflex accommodation occurs when the eye automatically adjusts its focus for near objects, such as when reading or looking at a close object. The ciliary muscles contract to change the lens shape, allowing the eye to focus on the nearer object. Reflex accommodation is triggered by visual stimuli.

3. volitional accommodation:
Volitional accommodation is the conscious effort to change focus, like when we purposely focus on a near object or look away from a distant object. It involves the intentional use of the ciliary muscles to focus the lens.

Step 2: Conclusion.
Each type of accommodation serves to adjust the eye's focus at different distances, allowing for clear vision of both near and distant objects.