What's the matter with slow reflection of light?

summary

The specific response to light retardation is that when the flashlight is used to irradiate the pupil, the change is very small, but the pupil enlargement is not obvious after the light source is removed. Light reflection is an examination method of pupil function activity, which can be divided into direct light reflection and indirect light reflection. What's the matter with slow light reflection? Next, I'd like to share my views with you.

What's the matter with slow reflection of light?

The afferent fibers of light reflex run through the optic nerve and the optic tract. When they approach the lateral geniculate body, they divide into internal tracts and reach the superior colliculus, ending at the anterior tectorial nucleus. The interneurons connect the bilateral oculomotor parasympathetic nucleus (EW), or the accessory autonomic nucleus.

When one eye is stimulated, the pupil of the other eye also contracts (indirectly responding to light). The reflex pathway starts from the EW nucleus, then goes along the oculomotor nerve to the ciliary ganglion, and the last neuron is sent from the ciliary ganglion cells to the pupil dilator.

When the light irradiates one eye, it causes the reflection of both sides of the pupil to shrink. It can also be diagnosed according to fundus examination and CT examination of orbital region. It should be distinguished from pupillary reflex pathway. When seeing near objects, the pupil shrinks due to adjustment and convergence, which is called pupillary near reflex,

matters needing attention

Choose a place with fresh air, or sit or stand, relax your whole body, look straight ahead, slowly inhale enough air, then open your eyes, stop for a moment, then slowly exhale the air, and then slowly close your eyes, 9 times in a row.