Laser Photocoagulation
Laser photocoagulation involves using a
small, powerful beam of light that is designed
to destroy the fragile, abnormal blood vessels (Choroidal
neovascular membrane -CNVM) found in certain
retinal conditions. The laser can also
destroy a small amount of the overlying retinal
tissue. Although the destruction of
retinal tissue during the procedure can itself
cause some loss of vision, this is done in the
hope of protecting the
fovea and preserving the
finely-tuned vision it provides.
How effective is laser surgery?
Controlled clinical trials, sponsored by the
National Eye Institute, have shown that
photocoagulation can reduce future vision loss
from
macular degeneration and
diabetic retinopathy. The treatment is most
effective when:
- The abnormal blood vessels (CNVM) have
not grown into the center of the
fovea, where they can affect vision.
- The eye care professional is able to
identify and destroy the entire area of
CNVM.
Does laser surgery restore lost vision?
Laser photocoagulation usually does not
restore lost vision. However, it does reduce the
chance of further CNVM growth and any resulting
vision loss.
Does laser surgery cure retinal diseases?
No. Macular degeneration and diabetic
retinopathy cannot be cured.
People with macular degeneration who
experience one bout of abnormal blood vessel
growth may have recurrent CNVM. Each recurrence
can damage vision and may require additional
laser therapy. It is crucial to detect and treat
CNVM as early as possible before it causes
significant visual impairment.
