•Dr Priscilia Imade
Nystagmus is characterised by involuntary, repetitive eye movements that can manifest in various patterns. It is often common among albinos.
Patterns
It presents in the following patterns:
Horizontal Nystagmus: The eyes oscillate horizontally, back and forth.
Vertical Nystagmus: Upward and downward movements of the eyes.
Rotary Nystagmus: Circular or rotational eye movements.
These movements may be rhythmic, pendular (smooth), or jerk-like, and they can occur constantly or in response to certain stimuli.
Types
Nystagmus can be classified based on its onset and underlying causes:
Congenital Nystagmus: Present from birth, often associated with visual impairments or neurological conditions.
Acquired Nystagmus: Develops later in life due to factors like neurological disorders, medication side effects, or inner ear disturbances.
Manifest Nystagmus: Visible without any specific triggers.
Latent Nystagmus: Becomes apparent only when one eye is covered, indicating a sensory imbalance.
Causes
Genetic factors: Inherited conditions that affect eye movements.
Neurological conditions: Brain injuries, tumors, or conditions affecting the brainstem or cerebellum.
Inner ear disorders: Disturbances in the vestibular system that regulates balance and eye movements.
Medication side effects: Certain medications can disrupt normal eye movement control.
Impact on vision and functioning
The presence of nystagmus can significantly impact visual perception and daily activities:
Reduced visual acuity: Constant eye movements can blur vision and reduce clarity.
Depth perception Challenges: Difficulty judging distances accurately.
Reading and focus issues: Struggles with maintaining focus on stationary objects.
Social and emotional impact: Potential challenges in social interactions and self-esteem, especially in cases of visible eye movements.
Management
This includes the following.
Vision correction: Prescription glasses or contact lenses to optimize visual acuity.
Visual aids: Magnifiers, tinted lenses, or electronic devices for reading and visual tasks.
Surgical options: In some cases, surgical procedures to correct underlying anatomical issues or reduce nystagmus intensity.
Visual rehabilitation: Vision therapy exercises to improve eye coordination, focus, and tracking skills.
Supportive environment: Accessible resources, educational accommodations, and emotional support to enhance quality of life.
*Dr Priscilia Imade is CEO, Modern Eye Clinic, Lagos. E-mail: moderneyecliniclagos@gmail.com
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