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Contact lens system offers panoramic retinal view during vitrectomy
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An wide-angle, two-piece contact lens system can provide a panoramic view of the retina during vitrectomy, according to two surgeons. The system is autoclavable, making it cost-effective and fast to reuse, the surgeons said.
Vinay Shah and K.V. Chalam at the University of Florida College of Medicine reported on the dual lens system, one lens being equatorial and the other wider-angle. The inferior lens is made of autoclavable plastic with a concave contact surface of 7.7 mm, and the superior lens is a convex glass lens. The superior lens is mounted on the inferior to make the assembly, the study authors noted. The lens is placed on the cornea atop a drop of viscoelastic.
The equatorial lens has a power of +81 D and a field of view of between 80· and 96·. The wider-angle lens power is +151 D, and the field of view is 110· to 120·.
“The lens is easy to sterilize by autoclaving and does not require expensive gas sterilization or potentially injurious chemical sterilization,” the authors report in the February issue of Ophthalmic Research.