Determination of the correct IOL power for a highly myopic eye with posterior staphyloma is fraught with difficulty. Here I employ two methods that can permit measurement of both the spherical and astigmatic power of the desired IOL, including the degree of “retinal astigmatism” caused by the staphyloma. I demonstrate the use of both wavefront technology and the Aphakic Refraction Technique (manifest refraction) to calculate the power of the IOL that is then inserted on the day following
This patient has persistent negative dysphotopsia after cataract-implant surgery performed 18 months ago. A combination of techniques is used to achieve the desired reposition of the IOL optic (reverse optic capture).
Treatment of one diopter of astigmatism is also demonstrated by the placement of 2 penetrating limbal relaxing incisions (PLRIs) at the steep corneal meridian.
In this case I present a variety of phaco techniques and pearls as cataract extraction and multifocal IOL implantation is performed in an eye with a small pupil and moderately floppy iris. A spit screen is utilized to demonstrate surgeon hand position throughout most of the procedure.
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.