A very interesting case, indeed! Here we will see a patient with considerable head movement, very advanced corneal endothelial dystrophy, pseudoexfoliation, and zonular laxity that prevents nucleus rotation.
This month’s case features methods for dealing with the problem of a patient with a very active Bell’s Phenomenon.
The use and design of my primary chopper to protect the posterior capsule during phacoemulsification, methods to remove extremely adherent lens cortex, and the creation of Penetrating Limbal Relaxing Incisions after implantation of a multifocal IOL are also discussed and demonstrated.
Following a standard cataract procedure, I address the reduction of IOP in this patient with open-angle glaucoma by implanting a stent in the trabecular meshwork.
Many patients experience severe photophobia in response to the microscope light. These patients are also often hyperesthetic, and this patient presented with both issues. Here I demonstrate the use of the “NLP” (no light perception) technique to eliminate photophobia, the soft lens/no ultrasound phaco method and the use of a low (50 mm Hg) IOP setting during phaco and I/A to eliminate the possibility of discomfort caused by a higher intraoperative IOP in this patient who also had a floppy iris.
This patient has a dense cataract, low ocular rigidity and unreliable preoperative biometry. The use of a high flow rate of 55 cc/min* to remove nuclear segments, wavefront aberrometry, and methods to prevent contact of the IOL with the endothelium during the late stages of the procedure are demonstrated.
In this issue I discuss and demonstrate the synergism of high IOP and high vacuum settings during phacoemulsification.
Tom is a courageous and engaging young man with advanced Duchenne’s Muscular Dystrophy. Years of steroid treatment have caused him to develop extremely dense cataracts and he is now legally blind. Severe muscular atrophy has left him quadriplegic with very significant respiratory problems that do not permit him to lie flat. Furthermore, even mild sedation could result in life-threatening oxygenation problems.
In this video our team performs cataract surgery without any sedation. Significant assistance is rendered by his mother, an RN who has essentially dedicated her life to caring for her severely disabled son. During the procedure, reverse Trendelenburg positioning, a positive pressure breathing apparatus and special draping to prevent claustrophobia enabled us to optimize his comfort and safety.
Tom now has 20/20 distance and near vision in both eyes without glasses, His remarkable bravery in dealing with this dreaded disease and the dedication of his mother are more than inspirational, and their joy at the recovery of his sight was wonderful to behold. From the vantage point of this surgeon, I can only attest to what my dedicated colleagues already know; this is why we became physicians.
This patient underwent cataract-implant surgery 3 weeks ago, has severe negative dysphotopsia and, fortuitously, a mild hyperopic refractive error.However, the preexisting capsulorhexis is too small to permit the optic to be captured. In this video I demonstrate rhexis enlargement prior to successful capture of the lens optic.
This patient has pseudoexfoliation, shallow anterior chamber, dense nucleus, lax zonule and poor pupillary dilation. I have previously demonstrated the use of capsular retractors for zonular laxity, but here we will see the latest version of these devices as modified by Dr David Chang. I also discuss the causes of chopping difficulties, demonstrate “verticalizing” the chopper, use of a CTR, and discuss IOL selection based on intraoperative findings.
Episode 11: Full Thickness (Penetrating) LRIs to Correct Astigmatism During Multifocal IOL Insertion
During this case I demonstrate the differences between phaco aspiration vs phacoemulsification of the nucleus, as well as the use of Penetrating Limbal Relaxing Incisions to control astigmatism in a multifocal IOL patient. The PLRI nomograms may be downloaded by clicking on the “PLRI Nomogram” button on this page.