2017
DOI: 10.2147/opth.s137346
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A new lens for observing fundus with a noncontact wide-angle viewing system

Abstract: 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.… Show more

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Cited by 4 publications
(3 citation statements)
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“…This procedure may result in postoperatively ocular discomfort, increased incidence of persistent corneal defect or haze formation, particularly in diabetic patients [11,13] . Recently, with the popular use of a noncontact wide-angle viewing system, various viscoelastic corneal lubricants or antidrying contact lenses were developed to avoid drying [4,[15][16][17][18][19][20][21][22][23] . However, they seem powerless to prevent occurrence of corneal edema.…”
Section: Introductionmentioning
confidence: 99%
“…This procedure may result in postoperatively ocular discomfort, increased incidence of persistent corneal defect or haze formation, particularly in diabetic patients [11,13] . Recently, with the popular use of a noncontact wide-angle viewing system, various viscoelastic corneal lubricants or antidrying contact lenses were developed to avoid drying [4,[15][16][17][18][19][20][21][22][23] . However, they seem powerless to prevent occurrence of corneal edema.…”
Section: Introductionmentioning
confidence: 99%
“…An important disadvantage of the noncontact lens system is dehydration of the corneal surface, which despite the use of frequent irrigation or viscoelastic material on the corneal surface results in defocusing of the fundus image (Kita et al. 2017). Water droplets on the lens surface may also reduce image quality, and condensation on the front lens must be managed by ensuring that draping around the eye does not impede breathing (Inoue 2014).…”
Section: Introductionmentioning
confidence: 99%
“…Wide-angle viewing systems offer a panoramic view of the surgical field and improve the safety and efficacy of vitreoretinal surgical procedures (Chalam & Shah 2004;Tabandeh et al 2019Tabandeh et al , 2020Tieger et al 2021), but they have some limitations. An important disadvantage of the noncontact lens system is dehydration of the corneal surface, which despite the use of frequent irrigation or viscoelastic material on the corneal surface results in defocusing of the fundus image (Kita et al 2017). Water droplets on the lens surface may also reduce image quality, and condensation on the front lens must be managed by ensuring that draping around the eye does not e1024 impede breathing (Inoue 2014).…”
Section: Introductionmentioning
confidence: 99%