Question: I
have read that having a multifocal lens implant installed would lead to
"halos" around lights when driving at night. First, how bad are the
halos-do they impair your vision enough to make driving at night difficult?
Second, if I get a lens that corrects my astigmatism and to see distance and
near vision (computers, etc.) but I need glasses for reading, would that be
considered multifocal enough to produce halos at night? If it does not produce
halos-what type of lens implant would you suggest I use to accomplish-far
vision, near vision and correct astigmatism and use glasses for reading? I am
76 years old.
Answer: First, multifocal lens implants are
a very specific type of lens implant in terms of design. There are a few
different designs produced by different manufacturers-each of which has
somewhat different optical characteristics and thus differing tendencies to
produce halos. Further, depending on your pupil size in bright vs. dim
illumination, your results could be better or worse than what you have read-and
could differ with each type of multifocal lens design. In addition, the shape
of your cornea and its aberrations could also cause halos.
So, there is no
simple answer. In order to choose the best multifocal lens implant for your
vision requirements and the distances you wish to see clearly at requires a
VERY thorough eye exam and consultation and measurements and cannot be accomplished
by discussing pros and cons of the designs. So-your best bet is to schedule a
consultation and examination with the best cataract surgeon who is also a
refractive surgeon and FULLY explain that you do NOT want halos. Then be
prepared to provide the measured distances that you wish to see clearly
for…i.e. the actual distance of where your computer sits and where you hold
reading material. From this information a refractive cataract surgeon should be
able to offer you options that might be the most desirable for you.
Important Note: The information
presented on the About Cataract Surgery Blog or provided in response to a request for
information in the Ask Cataract Surgeons section on aboutcataractsurgery.com is not intended
to diagnose or treat eye problems, eye conditions or eye diseases including
appropriateness of treatment, risks, complications or side effects as related
to Cataracts, Cataract Surgery or Lens Implants. In particular a response to an
inquiry made on the Ask Cataract Surgeons section of aboutcataractsurgery.com is not meant to
take the place of the professional medical care provided by your eye doctor,
ophthalmologist and Cataract Surgeon. Contacting us via e-mail or any
other means is not a substitute for medical care.
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