Focus On

Resight keeps surgical success in sight

Focus On …

Resight Keeps Surgical Success in Sight

Samantha Stahl, Assistant Editor

Busy retinal surgeon ed to performing lengthy and complex procedures, are quick to welcome any efficiency gains they can achieve. The Resight wide-angle fundus viewing system from Carl Zeiss Meditec offers an enhanced viewing experience and notable improvements in efficiency. The result? Benefits for patients and physicians alike: surgeons spend less time inside the eye, and less time inside the OR.

Compatible with the Opmi Lumera and Visu microscopes, the easily-attached device slides into position without altering the focal plane. Once in place, motorized inverters linking the microscope, camera and lighting system activate. The focused image is automatically inverted both for the surgeon's view, the built-in video camera and any external monitors in use. The microscope light also shuts off, allowing the surgeon to use a handheld light pipe as needed.


While a manual version of Resight is also available, the motorized system is popular due to its time-saving features and greater convenience for the surgeon and OR staff.

Sohail Hasan, MD, PhD, of Orland Park, IL, uses the motorized Resight system along with a wireless foot pedal, a feature he says vastly increases convenience by allowing hands-free control of the microscope settings.

Dr. Hasan likens the Resight system to getting behind the wheel of a luxury vehicle. "It's like driving home in a Toyota versus a Mercedes. You're going to get home either way, but you're going to be more comfortable and safer in the Mercedes," he says. "When visualization isn't ideal — say, with a dense cataract, lens glare or media opacity obscuring your view — the procedure is going to be a little easier with the Resight."

The Resight fundus viewing system attaches to the bottom of the surgical microscope.

He explained that the condensing lens is built into the device, and two smaller additional lenses can be rotated into view according to the demands of the procedure, such as membrane peeling or other work near the macula.

The Resight is slid into position and focused without affecting the distance from the cornea. "The fact that you can maintain the distance between the cornea and the first Resight lens is very convenient. The distance is always fixed, so it's much faster," he says.

A variety of other features contribute to the system's comfort, including the use of non-contact lenses, which Dr. Hasan describes as "superb." He says that with certain cases, such as a dry cornea, it is especially beneficial to be able to keep a safe distance from the ocular surface so as to allow lubrication of the cornea with greater ease. With complex surgeries requiring dissection of delicate membranes and scar tissue, "it's easier to have non-contact lenses because they give you more control," he says. "They are faster, always centered, and have a wider field of view."

The aspheric optics of the Resight system keep the 125-degree field of view in focus — a distinct advantage over other surgical systems, CZM says.

Resight is a fully sterilizable system, avoiding the need for costly disposables. Each system comes with three sets of trays and lenses, conveniently allowing one set to be in use while others are being sterilized.

Dr. Hasan says that adding the system to his surgical microscope posed no learning curve. It was, he says, as simple as taking "five seconds and saying, ‘OK, press this button to focus, done.'" RP

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