蕭裕泉醫師眼科筆記

 Posterior capsulotomy: history of using the YAG laser and best practices Alanna Nattis, DO  SightMD Babylon, New York Robert Weinstock, MD The Eye Institute of West Florida  Largo, Florida Stephen Weinstock, MD The Eye Institute of West Florida  Largo, Florida JULY 2023 | EYEWORLD Following cataract surgery, patients may  experience blurry vision. A posterior capsulotomy with the YAG laser is often  employed by physicians as a solution to help patients achieve their desired  vision. “A YAG capsulotomy has to be one of the most commonly performed procedures for  a cataract and refractive surgeon,” said  Robert  Weinstock, MD. “Fortunately, it’s a safe, easy,  and efficient technology.” Prior to YAG capsulotomies and the invention  of the YAG laser, this was a much more challenging condition because it required going  back into the eye and doing a surgical  procedure,  with the risk of infection. In addition,...

  Clearing up angle kappa Refractive September 2022/EYEWORLD by Liz Hillman Editorial Co-Director Angle kappa—“People don’t fully understand it, but most don’t even realize they don’t,” Daniel Chang, MD, told  EyeWorld . Dr. Chang is the first to admit that he didn’t. The subject of centration is 1) poorly defined in the literature, 2) inconsistent in its application, and 3) probably not as important for IOL surgery as most people suspect. Dr. Chang and George Waring IV, MD, wrote a perspective in 2014 describing what they found to be inconsistencies with definitions, applications, and use of various ocular reference axes and angles. 1  They also proposed a new, practical, and reproducible coordinate system for centration of refractive treatments. “When someone asks me about angle kappa, I ask how much effort they want to make to fully understand it.” Dr. Chang said. “The concepts are actually quite elegant, but the tough part is to unlearn what was previously partially u...

  Using CTRs in practice Cataract: Complicated cases September 2023 EYEWORLD by Ellen Stodola Editorial Co-Director A capsular tension ring (CTR) can be a useful tool for ophthalmologists to have on hand during surgery. Two physicians discussed the available products, when the best time is to use them, and methods for good placement. John Hart Jr., MD, said there are three CTR products that he routinely uses: a standard CTR, a Cionni CTR, and the Ahmed capsular tension segment.  “I use a CTR in approximately 10% of my cataract cases,” Dr. Hart said. “Patients with zonular abnormalities are commonly referred to me by other ophthalmologists. I think that most ophthalmologists don’t use them as frequently as I do.” When a CTR is properly positioned in the capsular bag, it distributes support from areas with intact zonules to areas with weak or missing zonules, Dr. Hart said. The CTR also keeps the equator of the capsular bag expanded in areas where zonules are missing. “This is i...