CONTACT LENSES TODAY
September 14, 2003
Contact Lenses Today® is edited by Dr. Joseph T. Barr and the staff of Contact Lens Spectrum.
This week CLToday® reaches nearly 10,000 readers in 74 countries.
Wise to Distribute Punctal Plug
Wise Optical has entered into an agreement with Surgical Specialties Corporation to distribute
Surgical Specialties' UltraPlug line of punctal plug products. The UltraPlug is designed to relieve dry eye syndrome and limits
tear drainage when inserted into the punctum. According to the companies, the plug is made of medical-grade silicone and is
engineered to provide a high degree of patient comfort.
Examining Affects of Carboxymethylcellulose
Allergan researchers investigated the potential for carboxymethylcellulose (CMC) to chemically
complex residual disinfectants found in current multipurpose solutions (MPSs) in situ. The results of the study, in which the
researchers examined the chemical availability of the MPS disinfectant polyhexamethylene biguanide (PHMB) using a spectrophotometric
assay, appear in the July 2003 issue of Eye & Contact Lens. After finding that the chemical availability of PHMB in water or MPS
was reduced within 10 minutes of adding CMC, the researchers concluded that CMC rapidly binds PHMB and reduces its chemical
availability and bioactivity. They also stated that their results suggest a potential cytoprotective effect of CMC on the ocular
surface when used before lens insertion.
The lenses you prescribe determine the direction of your practice.
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going to cut it. You need to offer your patients CooperVision premium lenses with tangible, differentiating benefits. Let your
patients experience the best vision possible with the Frequency 55 Aspheric or the unrivaled, all day comfort of Proclear
Compatibles. Visit http://www.coopervision.com.|
Paracon Helps Soderberg Expand CL Services
Soderberg, Inc. has announced that Paracon, Inc. will assist Soderberg in its distribution of
exclusive GP contact lens products such as Crystal-Vue, Sharp-Vue, Apogee and S-10. To see Soderberg's complete contact lens
product offerings, visit http://www.soseyes.com.
CIBA Doubles Production of Night & Day
CIBA Vision says that trial Night & Day lenses are readily available because it has doubled
production of the lenses. Now, according to the company, eyecare practitioners can refit patients in the lenses more aggressively.
The manufacturing expansion responsible for the ample supply of trial lenses is part of a multi-million dollar investment that CIBA
announced in June 2002 to nearly quintuple production of the lenses by 2004. To obtain a 70-lens trial set of the lenses, contact
your CIBA sales rep or distributor.
This literature review article points out numerous important factors and guidelines for diagnosing
and managing contact lens associated corneal infiltrates (CLACI). Although the exact prevalence and incidence are uncertain,
CLACI is far more common in extended wear. The authors state that with symptoms, and an overlying epithelial defect, even in the
absence of an anterior chamber reaction or discharge, lens wear should be discontinued, a culture taken and aggressive antibiotic
therapy initiated. Though in some definitive cases where infection is ruled out, no medical therapy may be necessary, but progress
should be monitored. Prevention of CLACI includes good lens fit and movement, compliance, avoiding toxic substances including
possible lens care products, regular lens replacement, high oxygen flux and consideration switching to daily disposable or GP
lenses if CLACI recurs in an extended wear patient.
Robboy, MW; Comstock, TL; Kalsow, CM. Contact Lens-Associated Corneal
Infiltrates. Eye & Contact Lens July 2003 29(3):146-154.
Residual Astigmatism -- Just Correct It
Tom Quinn, OD, MS, wrote an excellent column in the August issue of Contact Lens Spectrum
about when to use spherical lenses versus aspheric lenses versus toric lenses for astigmats depending on how much spherical
component they have. He also points out how as little as 0.50D of residual astigmatism can make a difference. It sure does. It's
interesting to teach young students about residual astigmatism. They never say it, but you can see the looks on
their faces and imagine them thinking, "So why not just correct it?" Great question! Sometimes the naive can lead you to the best
answer. Why not just correct it?
Three-Lens Dispensing for Presbyopes
I've been wearing "hard" contact lenses for 44 years (first PMMA and GP lenses for the past 15
years or more). As I approached middle age and reading became difficult, I added a 1.00D undercorrection in my nondominant eye
for when I'm in the office. I am 61 years old now and this still works for me. My myopia has gradually decreased over the years
from -4.00D OU to -2.00D OU. Whenever I have a patient in the presbyopic age, I demonstrate my own contact lenses and suggest a
three-lens solution. I prefer 20/20 OU outside of the office and wear the full prescription. I have converted many soft lens wearers
to GP lenses and the vast majority love them. Sharper vision, ease of care and longevity of the lenses are the benefits these patient
--Edmund J. Samuels, OD
Port Washington, Ind.
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