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International Newsletter and Forum on Rigid Gas Permeable Contact Lenses, Corneal Shape, Health and Vision |
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Forget Trial Lenses
 Nathan Efron has proven that making predictions is not an easy task. But I am going to try one myself. I predict that ten years from now, we won't be using trial lenses anymore for standard (R)GP lens fitting. Or we shouldn't be, at least. Contact lens manufacturing nowadays uses ultra-sophisticated, state-of-the-art lathing techniques that can produce lenses up to microns in accuracy. In the meantime, ocular surface imaging technology has also recently increased dramatically in accuracy. Some of the traditional Placido disk topographers are very precise these days, and 'point-source corneal topography' systems seem to improve the clinical performance of these, especially for the irregular cornea. Elevation topography and optical coherence tomography are also adding to the spectrum of imaging the shape of the cornea and even the anterior scleral surface. But what about the practitioner? We still are 'struggling' with last century (literally) trial lens sets with very limited design variation options and large-step (50 to 100 micron steps) intervals. It's time for a change. See also 'Technology to Optimize (R)GP Lens Comfort and Success' by Cary Herzberg in Contact Lens Spectrum and the 'virtual fitting' item that was covered in the last I-site newsletter. It's time to look toward the future. Young practitioners will love the new digital age of (R)GP lens fitting. Eef van der Worp
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When to Use a Scleral Lens?
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Scleral Lens Education Society
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Scleral Lens Resourses

Want to learn more about sclerals? The scleral lens educational society (SLS) published two new case reports in its latest newsletter. The first case report is on 'Success with Scleral Lenses for Post-LASIK Ectasia' by Melissa Barnett. Another case report looks at 'Mucin Deposits,' written by Langis Michaud. Consider becoming a member of the scleral lens society (free). Membership allows contact lens fitters access to the practitioners' section of the website that contains several outstanding scleral lens fitting resources. Or consider becoming a Fellow of the Scleral Lens Education Society (FSLS). Optometrists, ophthalmologists, and Fellows of the Contact Lens Society of America who have proven themselves in the field of scleral lens fitting can apply for status as a Fellow of the Scleral Lens Education Society, entitling them to be listed as a Scleral Lens Fitter on the SLS website, which is accessible to the public.
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No Kidding?
 Fitting contact lenses in children remains a bit of a controversial topic. Jeff Walline from the Ohio State University (USA) continues to do groundbreaking work in the area of children and contact lenses. One of his latest findings, reported at ARVO (the association for research in vision & ophthalmology) was that long-term contact lens wear success is not contingent on patient age. Fitting children at younger ages has no harmful long-term effects, Jeff Walline reports in Optometric Management based on that study. Nathan Efron et al published a paper called 'Survey of Contact Lens Prescribing to Infants, Children and Teenagers' in Optometry & Vision Science. They report that orthokeratology represents 28% of all contact lenses prescribed to minors (age <18). Michael Lipson in Optometric Management looks at how to address parents' concerns about ongoing refractive change in myopia progression in kids and specifically covers the topic of overnight corneal reshaping in children.
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Are Multifocal (R)GPs in Aphakic Children an Option?
Every year, about 29,000 children are born in Europe and North America with congenital cataract and need surgery during their first weeks of life. Instead of offering unpopular bifocal glasses on top of their single vision aphakic contact lenses to these children after the surgery, multifocal (R)GP contact lenses may offer an excellent opportunity for the visual development of unilateral or bilateral aphakic children's eyes, according to Michael Baertschi and Michael Wyss from Switzerland. See link for this month's case report on fitting a large, bi-toric, trifocal (R)GP lens on one eye and a peripheral-toric, single vision (R)GP contact lens on the other eye of a young aphakic patient.
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Upcoming Events
- ECLSO, 9-11 Sept, Istanbul TR
- Vision Expo West, 21-25 Sept, Las Vegas USA
- Introduction to Scleral Lens Practice, 29-30 Sept, Hertford UK
- CLMA, 6-9 Oct, La Jolla USA
- AAO, 12-15 Oct, Boston USA
- GPLI Clinical Symposium, 23 Oct, Chicago USA
- BCLA Pioneers lecture, 23 Nov, London UK
- Global Specialty Lens Symposium, Jan 26-29 2012, Las Vegas USA
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GSLS Call for Papers, Posters, and Photo's
The Program Committee of the Global Specialty Lens Symposium invites the submission of abstracts for the Free Papers and Scientific Posters for the program taking place from January 26 - 29, 2012. Submissions related to presbyopia, keratoconus, corneal topography, post-penetrating keratoplasty or related irregular corneal surface, myopia control, ortho-k and lens care topics are welcome. Deadline for submissions is August 31, 2011.  New to the program this year is the photo contest. Contestants may submit up to two photographic images in the following anterior segment categories: Contact Lens, Lids, Cornea/Conjunctiva. Visit the redesigned website at www.GSLSymposium.com. |
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I-site is an educational newsletter that is distributed on a monthly basis and provides an update on rigid gas permeable related topics (scientific research, case reports and other publications worldwide). I-site is objective and non-political. Its editor Eef van der Worp, optometrist, PhD, FAAO, FBCLA, FIACLE is a lecturer for a variety of industry partners, but is not related to any specific company. Please contact us at: i-site@netherlens.com. |
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