Eagleview Eye Clinic

Tag pupil

PUPIL

The pupil is the circular opening in the center of the iris, the colored part of the eye. It plays a crucial role in regulating the amount of light that enters the eye.

Key characteristics:

  1. Location: The pupil is located in the center of the iris.
  2. Function: The pupil:
    • Regulates light entry into the eye
    • Adjusts size to control light intensity
    • Helps maintain optimal vision
  3. Size adjustment: The pupil:
    • Constricts (gets smaller) in response to:
      • Bright light
      • Near vision
      • Certain medications
    • Dilates (gets larger) in response to:
      • Low light
      • Emotional arousal
      • Certain medications or substances
  4. Control: The pupil’s size is controlled by the autonomic nervous system, specifically the:
    • Parasympathetic nervous system (constriction)
    • Sympathetic nervous system (dilation)

Importance: The pupil’s ability to regulate light entry is essential for maintaining optimal vision, protecting the retina, and responding to changes in lighting conditions.

ANISOCORIA

This anisocoria is defined as an inequality in size of the pupil.

Anisocoria is usually an efferent pupillary effect.

Anisocoria can be as a result of a couple of factors which includes, trauma to the head, surgery, lesion in the visual pathway,  aneurysms, et.c.

Some signs and symptoms includes, blurry vision, photophobia, diplopia eye pain et.c

Diagnosis requires physical examination, and imaging scans .

Treatment involves treating the underlying causes

ANIRIDIA

ANIRIDIA is simply the absence of a muscular structure called the Iris.

The iris forms the pupil which controls how light enters the eyes. The iris is also responsible for eye color. So incases of Aniridia, the eyes just appear black.

This condition can be congenital, affecting both eyes or traumatic due to a penetrating injury.

For some people Aniridia can result in a significant loss of vision, while for  others visual reduction mild.

Use of contact lenses can help control light and improve vision. Use of photochromic glasses or sunshades can also help to significantly improve vision.