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Statement of Diana Zuckerman, Ph.D.
President, National Research Center for Women & Families
At the FDA Advisory Panel Meeting
Regarding LASIK Devices
April 25, 2008
I am glad to testify on behalf of the National Research Center
for Women & Families, a nonprofit organization that is dedicated
to using research-based information to improve programs and policies
that affect the health and safety of adults and children.
I am trained in epidemiology at Yale Medical School, and that
training is usually very helpful when I participate in FDA advisory
committee meetings. Since FDA did not make LASIK safety and efficacy
data available to the public prior to this meeting, I must rely
on published data on LASIK procedures and interviews with patients
who have told us about their experiences.
The FDA's mission is to ensure that medical products are safe
and effective. For LASIK, it is essential that we remember that
safe alternatives are less expensive and readily available: glasses
and contact lenses. The risks have to be examined in that context.
It is clear that patients who have had serious problems from LASIK
surgery feel that they were not warned about the risks. There
is excellent information on the FDA web site about the risks of
LASIK procedures in general, but who reads the FDA web site? This
advisory committee should respond to any questions about the FDA
web site by reminding the FDA that there are better mechanisms
for ensuring informed consent for patients than the FDA web site
or product labeling.
There are criticisms that should be made of the FDA web site information
on LASIK, especially regarding specific devices. The FDA web site
information for patients and professionals is difficult to navigate
and the information is not useful to patients. Even the patient
booklets are clearly not designed to help patients:
they are much too long, the vocabulary is much too sophisticated
-- using terms such as "visual acuity" and "N=350" -- and the
booklets look like a grad school homework assignment. They are
clearly not designed to be read - if they were, they would not
start with a biology lesson about parts of the eye. To be blunt:
the patient booklets are apparently designed to satisfy someone
at the FDA who does not care if any patients read or understand
the patient booklets.
I want to conclude my remarks by commenting on the questions you
will vote on today. There are several possible adverse reactions
that you apparently will not be asked to address, but you should
be. Most important are eye pain and chronic dry eye. Dry eyes
are the most common complication from LASIK, with approximately
half the patients having that adverse reaction in the first week
after surgery (Hovanesian et al, 2001) and 20% persisting more
than 6 months (Shoja & Beharati, 2007). This problem is more likely
among women patients and those with higher attempted correction.
Eye pain can be caused by dry eyes, or have other causes. Both
are debilitating, serious complications and must
be included in your questions.
The need for additional surgery is also important to measure and
to warn patients about. Research by Alio et al. (2008), published
this year in the American Journal of Ophthalmology , reported
that 28% of the eyes treated with LASIK needed
re-treatment within 10 years because of undercorrection,
overcorrection, or regression. The percentage of patients
was even higher: 35%. Patients need that information.
The possibility of high suicide rates among patients has been
raised, but better research is needed. I contacted the Emory University
researchers whose work has been cited but not published, but was
unable to obtain information about their research.
Overall, patients do not seem to have informed consent when they
have LASIK surgery, and part of the reason is the relatively little
long-term data available to share with potential patients. I would
like to assume that the health professionals involved wanted to
give the best possible informed consent to their patients, but
in general health professionals focus on the "consent" part of
informed consent, not the "informed" part. Informed consent is
a process, not a piece of paper. Potential patients need clear,
understandable information in advance of making a decision. Patient
booklets should be short, focused on risks and benefits, easy
to understand, user-friendly, and required. The
information in the booklets should be reiterated by the health
professionals, not undermined with reassuring statements such
as "this procedure is very safe" or "all my patients are very
happy." Patients deserve better and it is your job to urge the
FDA to make sure patients get the information they need.
References
Alio JA et al. Ten-year follow-up of laser in situ keratomileusis
for myopia of up to - 10 diopters. Am J of Opthalmology
2008; 145: 46-54.
Hova JA. Symptoms of dry eye and recurrent erosion syndrome after
refractive surgery. J Cataract Refract Surg 2001; 27:
577-584.
Shoja MR Besharati MR. Tear volume and stability after LASIK.
Eur J Ophthalmol 2007; 17 (1): 1-6.
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