This clinical study has been carried out with the purpose of
providing an overview of eye movement abnormalities in Parkinson's disease. The
eye is a biological camera that has been endowed with us, and while tracking
ocular movement is a simple activity, it offers valuable insights into the
diagnosis of Parkinson's disease. While many of the abnormalities are generic,
some are quite specific, such as progressive supranuclear palsy or oculogyric
crisis in post-encephalitic Parkinson's disease. The eye symptoms of
parkinsonism are vague. Retina contains
dopamine, hence ocular symptoms like astenopia are common in PD. In the neurology outpatient department, a
cohort of 100 patients diagnosed with Parkinson's disease and Parkinson's plus
syndromes were meticulously examined. Demographic details, detained history,
ocular signs and symptoms, ocular deviation, visual acuity, diagnosis, and
management aspects are extracted from the medical records. Visual acuity by
Snellen values. Ocular deviations were measured by prism cover test and ocular
motility was carried out to evaluate the gaze limitation. A diagnosis of CI was
made if the near point of convergence (NPC) value was larger than 10cm. Saccade
and pursuit scores evaluated using the Northeastern State College of Optometry
method were used to determine if they had lower than age-expected norms. Color
vision was assessed using Ishihara pseudo isochromatic plates. Reading speed
was measured in words per minute (WPM) based on reading a simple paragraph in
an English magazine for a minute. The developmental eye movement (DEM) rate was
calculated based on the time taken for the vertical and horizontal tasks on the
DEM test. The protocol of eye movement examination was followed. The study
highlights the significant burden of ophthalmologic symptoms in PD and
emphasizes the importance of addressing these symptoms in the management of the
disease. The Parkinsonian group of illnesses is distinct in that most of the
time, eye movements are disturbed, providing us with important diagnostic
information. The most commonly impacted are smooth pursuit fixations and
saccades.
Author(s) Details
Jasmine Kalyani
Department of Neurology, Tirunelveli Medical College,
Palayamkottai, Tirunelveli, Tamil Nadu, India.
S. Saravanan
Department of Neurology, Tirunelveli Medical College,
Palayamkottai, Tirunelveli, Tamil Nadu, India.
Jason Ambrose
Department of Neurology, Tirunelveli Medical College,
Palayamkottai, Tirunelveli, Tamil Nadu, India.
Ravi,
Shankaranarayanan
Department of Neurology, Tirunelveli Medical College,
Palayamkottai, Tirunelveli, Tamil Nadu, India.
Please see the link:- https://doi.org/10.9734/bpi/mria/v8/319
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