Hideyuki Futamura

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PURPOSE To report a new sutureless ring system to fix corneal contact lens in place during vitrectomy. DESIGN New surgical instrument. METHODS The sutureless ring system consists of a stainless steel ring that has two upright tabs 180 degrees apart with a hook on the top and two elastic silicone bands 8 mm in diameter to fix the ring to the eyelid(More)
The authors report a new biconcave contact lens capable of providing superior surgical views of eyes during vitrectomy and intraocular lens implantation under both fluid-filled and air-filled conditions. The new biconcave lens is made of a glass with a high refractive index (nd = 1.883). The lens is placed on the cornea using a regular lens ring for the(More)
PURPOSE To describe a method to alter the angular field of view of the fundus in gas-filled eyes during pars plana vitrectomy and phacoemulsification with aspiration and intraocular lens implantation. v Description of a new surgical method. METHODS The amount of viscoelastic material injected into the capsule is regulated, altering posterior capsule(More)
Although wide-viewing systems are commonly used during vitrectomy, conventional floating contact lenses are still used especially during macular surgery because they provide a clearer view and better stereoscopic images. Two types of lens ring systems are used with the planoconcave floating lens during vitrectomy; one is the conventional lens ring sutured(More)
PURPOSE To obtain a surgical contact lens with adequate operative field in vitreous surgery of gas-filled eyes. METHODS We designed a new biconcave prism contact lens for gas-filled eyes by improving the material and the design of the lens (prism angle, radius and area of front concave of the lens). The operative field was calculated by a simulation using(More)
PURPOSE Viewing the fundus at higher magnification during vitrectomy makes surgical procedures much safer; however, the scope of magnification of the peripheral fundus has been limited. For better visualization of the periphery of the fundus, we have developed two new contact lenses called magnifying prismatic lenses. METHODS The magnifying 15 degrees and(More)
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