Commercially available rigid gas-permeable contact lens for protecting the cornea from drying during vitrectomy with a wide viewing system

Kamei, Motohiro; Matsumura, Naohiro; Sakaguchi, Hirokazu; Oshima, Yusuke; Ikuno, Yasushi; Nishida, Kohji

doi:10.2147/opth.s33595

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…The CL designed by Chihara and Kita 10 is bigger, but its posterior curve radius and optical zone diameter do not accurately match in clinical practice, which could lead to incomplete filling of viscoelastic agents and bubbles under the CL. Kamei et al 11 reported that soft CLs might curl on the cornea and dry after a few minutes during the surgery. Commercial rigid gas-permeable (RGP) lenses provide the same clear vision as BSS, Viscoat, and vitrectomy lenses.…”

Section: Discussionmentioning

confidence: 99%

Optimization of Contact Lenses for Corneal Protection During Vitreoretinal Surgery

Sang

Jinxin

Hu³

et al. 2020

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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Objectives: To optimize parameters of contact lenses (CLs) and evaluate their ability to protect the cornea during vitreoretinal surgery. Methods: We compared the protective effects of balanced saline solution, viscoelastic agent, and CLs on rabbit corneas under conditions simulating vitreoretinal surgery. We evaluated CLs of different thicknesses and compared the protective effects of polymethyl methacrylate (PMMA) and gas-permeable fluorosilicone acrylate (XO) lenses on the corneas of rabbits and patients with severe proliferative diabetic retinopathy (PDR). The corneal fluorescein staining score (FSS) was measured to compare the protective effects of CLs. Results: The FSS was significantly lower in the PMMA group than in the balanced saline solution and viscoelastic agent groups. The thickness of the PMMA lenses had no significant effect on the FSS. The FSS was significantly higher in the PMMA group than in the XO group. In patients with PDR, on day 1 after vitreoretinal surgery, the FSS was significantly higher in the PMMA group than in the XO group, although no significant difference was observed on postoperative day 7. Conclusion:The XO lens offers better corneal protection during noncontact wide-angle vitreoretinal surgery and protects the corneal epithelium more efficiently during vitrectomy in patients with PDR, irrespective of its thickness.

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Section: Discussionmentioning

confidence: 99%

Optimization of Contact Lenses for Corneal Protection During Vitreoretinal Surgery

Sang

Jinxin

Hu³

et al. 2020

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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“… 5 , 6 However, a lens holder or a fixation ring is necessary when using this procedure. While a rigid gas-permeable contact lens for myopia has also been reported to be ideal, 7 it is designed to be movable on the cornea in order to prevent hypoxic damage during daily use. Therefore, this would be a disadvantage when performing vitrectomy.…”

Section: Discussionmentioning

confidence: 99%

A new lens for observing fundus with a noncontact wide-angle viewing system

Kita¹,

Fujii²,

Hama³

2017

OPTH

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Drying of the cornea during surgery, which causes poor visibility of the fundus, is one of the most serious problems when using a noncontact-type wide-angle viewing system. This study used a newly commercialized lens for observing the fundus with a noncontact wide-angle viewing system. The lens used has a very thin meniscus made of polymethyl methacrylate and a large outer diameter. Following the application of viscoelastic material, the lens can be put on the cornea without using a contact lens fixation ring. The larger diameter and lightweight characteristics of the new lens contributed to the overall stabilization. The smooth surface of this lens was able to achieve an intraoperative view of good quality not only during vitrectomy but also during scleral buckling procedures.

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“…In their system, a magnifying contact lens is held on the cornea using a lens holder or a fixating ring. Kamei et al6 compared a commercially available rigid gas-permeable contact lens (−3 diopters) with a system that used a balanced salt solution, a viscoelastic agent, a vitrectomy contact lens, and a soft contact lens, and found the rigid gas-permeable contact lens to be ideal for use during vitrectomy when performed with a wide-angle viewing system. The rigid gas-permeable contact lens is designed to be movable on the cornea in order to prevent hypoxic corneal damage in daily use.…”

Section: Discussionmentioning

confidence: 99%

New type of antidrying lens for vitreous surgery with a noncontact wide-angle viewing system

Chihara

Kita

2013

OPTH

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Drying of the cornea during surgery, which causes poor visibility of the fundus, is one of the more serious problems when using a noncontact type wide-angle viewing system. We developed an antidrying corneal contact lens for use with this type of viewing system. The lens has a very thin meniscus made of polymethyl methacrylate with a large outer diameter. Following application of the viscoelastic material, the lens can be put on the cornea without using a contact lens fixation ring. The larger diameter and lightweight characteristics of our lens contributed to its overall stability. The smooth surface of this prototype lens was able to achieve an intraoperative view of good quality, not only by preventing the cornea from drying, but also by providing a smooth surface over the entire cornea.

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Commercially available rigid gas-permeable contact lens for protecting the cornea from drying during vitrectomy with a wide viewing system

Cited by 9 publications

References 7 publications

Optimization of Contact Lenses for Corneal Protection During Vitreoretinal Surgery

Optimization of Contact Lenses for Corneal Protection During Vitreoretinal Surgery

A new lens for observing fundus with a noncontact wide-angle viewing system

New type of antidrying lens for vitreous surgery with a noncontact wide-angle viewing system

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