Many of us have heard of glaucoma, but don’t quite know what it is. We know
that it is something that can cause blindness, and may even know someone who has
it. Glaucoma is a disease of the optic nerve, a bundle of nerve fibers behind your
eye that carries visual information between the eye and the brain. In glaucoma,
optic nerve fibers gradually die, and blind spots in the vision develop. If not
detected and treated, those blind spots silently grow and start to affect vision.
Damage is not reversible, and eventually blindness can result. Glaucoma is most
often detected in adulthood, but forms can develop at birth, during childhood or
adolescence.
HOW CAN MY DOCTOR TELL IF I HAVE GLAUCOMA?
A complete eye exam involves checking the eye pressure, which refers to the
pressure of the fluid within the front part of your eye. This pressure depends on the
balance of fluid being made and draining within the eye. It is even more important
to examine the optic nerve itself, by looking directly at it with special lenses,
performing digital photography of the optic nerves, or doing scanning
measurements of the nerve tissue. The optic nerve is sensitive to fluctuations in eye
pressure – some peoples’ eyes can tolerate higher pressures with no problem, while
others may begin to develop optic nerve damage at normal eye pressures.
Lowering the eye pressure with medications, laser treatments or surgery can
stabilize glaucoma and prevent vision loss.
My vision is fine and I have no family history of glaucoma. Do I really
need to be checked?
Yes. At least once a year if you are 40 or older. Glaucoma is a silent, devastating
condition that has no symptoms until it reaches the advanced stages. If it is
diagnosed at that time, the damage cannot be reversed. If signs of glaucoma are
detected early, while vision is still good, people can maintain good vision for the
rest of their lives. Regular examinations and testing, and treatment with
medications, laser or surgery can protect the vision that allows us to maintain our
freedom and independence as we age. Knowing is power. Invest in that power by
scheduling an eye exam for yourself and your loved ones, and it will pay dividends
to you for many years to come.