Despite a reduction in the overall brightness, these patients often report greater visual comfort at night, even though they might have some trouble under conditions of very low light. “ there is remarkable improvement in visual acuity, the balance is very much favorable.”Ī key point to remember, according to Trindade, is that these patients already have terrible night vision before surgery, with incapacitating glare and reduced acuity. “It might be a problem in a very dark environment, but overall, it is usually well tolerated if they are getting something out of it,” Trindade said. In terms of adverse events associated with the use of the implant, patients can report a darkening of their vision. “Patients with mild central corneal opacities might do well during a pinhole acuity test but are not good candidates for intraocular pinhole devices,” Trindade said. If BCVA is below 20/100 or the cornea has central opacities, this approach is usually not recommended,” he said.Ī preoperative pinhole acuity test, along with BCVA, provides a fair estimation of the final surgical outcome in most patients, but it’s important to take this test with a grain of salt. “Our experience suggests a cutoff of approximately 20/100 in BCVA. To use the XtraFocus pinhole implant, the cornea must have a minimum level of optical quality, Trindade explained. The greatest advantage of this approach is the reduced level of uncertainty, which is quite the contrary of what we see in anterior corneal transplantation. “Even for those who do well with scleral lenses, we must weigh the risks and burdens of long-term contact lens dependency.” Refractive lens exchange is a reliable method to tackle lower order aberrations, and the pinhole effect takes care of the higher order aberrations.”įor many patients who don’t do well with scleral lenses, it’s either this or deep anterior lamellar keratoplasty, Trindade said. If the cornea is stable and still has a reasonable optical quality, it might be wiser to bypass the topographic imperfection than try to fix it. “We should also consider it in cases of irregular corneas and a clear lens. “This implant is not a tool for only cataract surgery,” Trindade said. This black, hydrophobic acrylic implant has an overall diameter of 14 mm, an occlusive zone of 6 mm, a pinhole aperture of 1.3 mm, and a required incision of 2.2 mm. XtraFocus is intended for the treatment of irregular astigmatism, such as in keratoconus and postradial keratotomy, but Trindade suggests a wider view of the uses of the implant. It can be implanted both in the sulcus or in the bag with the IOL. The XtraFocus is a supplementary pinhole implant designed to be used in piggyback with a regular IOL. “It is a powerful tool for complicated corneas,” Trindade said during an interview with Ophthalmology Times®, following his presentation at the 53rd Sally Letson Symposium in Canada. Thanks to our very generous donors, Essilor Canada, Essilor Vision Foundation, McCray Optical and Mood Eyewear, the I-Care Project is barrier-free for students.There are positives and negatives to using the XtraFocus pinhole implant, according to Claudio Trindade MD, PhD, an anterior segment surgeon based in Brazil, who has assisted in the development of the implant.
Other members of the Seneca community receive access to vision screening and a comprehensive eye exam performed by a licensed optometrist in our cutting-edge refraction lab located at the Newnham Campus.ĥ.5 million Canadians live with uncorrected poor vision - we want to make sure all Seneca students have access to health care so they can be successful in their studies and when they enter the world of work. Led by staff and faculty from the Opticianry program, the I-Care Project helps Opticianry students prepare for careers as eye care practitioners by offering valuable hands-on experiential learning opportunities.
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It will also make vision screening and full comprehensive eye exams accessible to the Seneca community.
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This initiative will help educate the Seneca community on how to prevent sight loss, and protect, preserve and prioritize vision health. In February 2022, Seneca launched the I-Care Project in partnership with Essilor Canada and the Essilor Vision Foundation. The I-Care Project brings new meaning to eye care
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