GLAUCOMA OF THE EYE
·
It is a
sight-threatening problem wherein the optic nerve, which carries visual
information between the eye and the brain, becomes damaged or injured, causing
changes in the transmission of visual information resulting in impaired vision.
·
It is the second
leading cause of blindness in India ,
after cataract, affecting any age group, including newborn, infants, children
and elderly.
·
It can occur in
either or both eyes, though it cannot spread from one eye to the other.
·
Patients with
glaucoma may be unaware of any change in their vision until late in the course
of the disease as it is a progressive condition.
·
Blindness from
glaucoma is irreversible, and its early detection is of utmost importance.
·
Steroid-induced
glaucoma is the change in intraocular pressure (eye fluid pressure) due to
steroid administration, eventually resulting in damage to the optic nerve.
·
Eye fluid
(aqueous humor) nourishes the cornea, iris and lens by circulating, and then
draining out of the eye.
·
Increased
intraocular pressure due to steroids causes the drainage system to get clogged,
thereby increasing the pressure inside the eye, which starts damaging the optic
fibre.
INDIVIDUALS AT RISK
·
Over 40 years of
age.
·
Those with
diabetes, thyroid disease, or hypertension.
·
Those with family
history of glaucoma, diabetes, hypertension and short-sightedness.
·
Have received
steroid-containing tablets, drops, ointments, puffs or injections.
·
Frequent use of
steroid eye drops purchased from chemists without doctor’s diagnosis.
·
Take medication
for sleep, anxiety, depression, asthma or parkinsonism.
·
Have had an
injury to the face or eye myopia.
SYMPTOMS OF GLAUCOMA
·
Rainbow coloured
rings (halos) around bright light.
·
Headaches.
·
Frequent changes
in eyeglass or contact lens prescription.
·
Difficulty in
driving.
TREATMENT
·
As glaucoma is a
progressive eye disease, the course of treatment is lifelong.
·
Like diabetes, if
the treatment is left midway, the condition worsens.
·
There are 2 types
of glaucoma – open angle and closed angle.
·
In open angle
glaucoma, resistance to the flow of eye fluid is increased, while in closed
angle glaucoma, there is physical obstruction to the flow of eye fluid.
·
On an average,
closed angle glaucoma patients are nearly 10 years younger than the open angle
patients, with a greater damage.
·
By the time a
patient is detected to be having glaucoma, 90% have lost 50% of their eyesight.
·
Opting for
periodic glaucoma screening early in life can help in starting treatments early
to improve the chance of halting and slowing down the continuous damage
significantly.