- Created by: lemonlemonade
- Created on: 05-11-19 18:15
The iris reflex is for adjusting the iris when there is an evironment with bright or dim light.
Dim Light- Radial muscles contract and circular muscles relax and the iris widerns to let the most light in as possible.
Bright Light- The circular muscles contract and the radial muscles relax to make the iris smaller so the least amount of light gets in.
Looking at close objects: Cilliary muscles tighten which mean that the suspenory ligment will relax the lens becomes wider which increases the amount of light it refracts.
Looking at distant objects: Cilliary muscles relax and the suspensory muscles contract…