Duration 5min, Q&A 3min
Images of Visual Perceptions Experienced During Cataract Surgery Projected onto Retinal Surface of Model Eye
Visual perceptions have been experienced by patients during cataract surgery but the origin of these visualizations has not been definitively determined. The aim of this study was to recreate and evaluate the images reported by patients during cataract surgery in a model eye.
Experimental study and case series of 20 patients who underwent cataract surgery.
A fluid-filled posterior translucent model eye with a frosted surface which corresponded to the retina was used. An artificial cataract silicone lens injected with white dye, an intraocular lens (IOL), or an irrigation/aspiration (I/A) tip was inserted in the model eye. Simulating the surgical procedure, the images from the patient's view (posterior view) and the surgeon's view through the surgical microscope (anterior view) were simultaneously recorded and evaluated. Video clips were shown to 20 patients before cataract surgery and a questionnaire to evaluate the similarity to their visual perception during the surgery was analyzed postoperatively.
Results and Conclusion
The images of the posterior view through the cataractous lens or IOL were seen as a bright light from the surgical microscope. When the I/A tip and/or the IOL were inserted, the images of the I/A tip, water-stream, and haptics and optics of the IOL were recognized. When the microscope light was turned off, the images of the microscope and outside view were observed. The incidence of the patients who answered that the visual perception was exactly the same or similar with the video clips was 70% in the movement of the lens fragments and 55% in IOL insertion. Eighty percent of the patients recommend that patients scheduled for cataract surgery watch the video clips before the surgery.
The patient's visual perceptions during cataract surgery may be accurately reproduced with the model eye. Images of the objects in the anterior chamber can be projected on the retina even without optics. The light from the microscope may hamper visualization of the images of instruments during cataract surgery. To watch the video images preoperatively may help to reduce apprehension from the visual perception during the surgery.
[ Keyword ]
cataract surgery / ocular imaging / visual perception
[ Conflict of Interest ]